There are 722 words that start with OP in our word list of 382,657 words, and every one of them is on this page — grouped by length so you can scan fast, with a live filter when you need something narrower. The biggest group is the 8-letter words (113 of them); the spread is 1 of them 2 letters long, 5 of them 3 letters long, 11 of them 4 letters long, 18 of them 5 letters long, and more up to 15 letters. The longest entries are openheartedness, openmouthedness and ophioglossaceae. Word-game players keep lists like this open for a reason: Scrabble and Words With Friends reward the obscure corners of the dictionary, crossword solvers live on pattern matching, and Wordle players work by elimination.
The full list
2-letter words (1)
op
3-letter words (5)
opa ope opp ops opt
4-letter words (11)
opah opai opal opec oped open opes oppo opsy opts opus
5-letter words (18)
opahs opals opata opelu opens opepe opera ophic ophir ophis opine oping opium oppos opsin opted opter optic
6-letter words (47)
opacus opaion opaled opaque opcode opelet opened opener openly opepes operae operas operla operon ophian ophion ophism ophite ophrys opiane opiate opifex opiism opilia opined opiner opines opioid opiums oporto oppian oppida oppone oppose oppugn opsins optant optate opters optics optima optime opting option optive opulus opuses
7-letter words (74)
opacate opacify opacite opacity opacous opaleye opalina opaline opalish opalize opaloid opaqued opaquer opaques opcodes opencut openers openest opening operand operant operary operate opercle operons operose opgefok ophelia ophidia ophioid ophites ophitic ophiura ophryon opianic opianyl opiated opiates opiatic opifice opimian opinant opiners opining opinion opioids oporice opossum oppidan oppidum opplete opposal opposed opposer opposes opposit oppress oppugns opsonia opsonic opsonin optable optably optants optical opticly opticon optimal optimes optimum options opulent opuntia opuscle
8-letter words (113)
opalesce opalines opalinid opalised opalized opaquely opaquest opaquing opdalite openable openband openbeak openbill opencast openhead openings openness openside openwork operable operably operance operancy operandi operands operants operated operatee operates operatic operator opercele opercled opercula opercule operetta operette ophiasis ophidian ophidion ophidium ophionid ophitism ophiucus ophiuran ophiuras ophiurid ophthalm opiating opificer opilonea opinable opinably opinator opiniate opinicus opinions opiumism opodymus opopanax opoponax oporices opossums oppidans oppilant oppilate opponens opponent opposers opposing opposite oppossum opposure opprobry oppugned oppugner opsigamy opsimath opsonify opsonins opsonise opsonist opsonium opsonize opsonoid optation optative optician opticism opticist opticity optimacy optimate optimise optimism optimist optimity optimize optimums optional optioned optionee optionor optogram optology optotype opulence opulency opuluses opuntias opuscles opuscula opuscule
9-letter words (112)
opacified opacifier opacifies opacities opalesced opalesces opalesque opalinine opalizing opalotype opedeldoc opegrapha openchain openworks operabily operagoer operantis operantly operatics operating operation operative operatize operators operatory operatrix operceles opercular opercules operculum operettas operosely operosity ophidians ophidioid ophidious ophiolite ophiology ophionine ophiuchid ophiuchus ophiurida ophiuroid ophthalmy opiliones opination opinative opiniated opiniater opiniatre opinional opinioned opiomania opiophagy opiparous opisthion opiumisms opobalsam opodeldoc oppilated oppilates oppletion opponency opponents opportune opposable opposites oppressed oppresses oppressor oppugnacy oppugnant oppugnate oppugners oppugning opsimathy opsisform opsistype opsonized opsonizes opsonogen optatives opthalmic optically opticians opticists optigraph optimally optimates optimeter optimised optimises optimisms optimists optimized optimizer optimizes optionals optionary optionees optioning optoblast optometer optometry optophone opulaster opulences opulently opuntioid opuscular opuscules opusculum
10-letter words (86)
opacifying opacimeter opalescent opalescing opalinidae opaqueness openairish openhanded opennesses operalogue operameter operatable operatical operations operatives operculata operculate operculums operettist ophelimity ophicleide ophidiidae ophidology ophiobolus ophiolater ophiolatry ophiolitic ophiologic ophiomancy ophiomorph ophioninae ophiophobe ophiophoby ophiouride ophisaurus ophthalmia ophthalmic ophthalmol opiliaceae opilionina opilionine opiniaster opiniastre opiniative opinicuses opinionate opinionist opiomaniac opisometer opisthenar opisthotic opodidymus opotherapy oppilating oppilation oppilative opposeless opposingly oppositely opposition oppositive oppressing oppression oppressive oppressors opprobrium oppugnance oppugnancy opsiometer opsonified opsonifies opsonizing opsonology optatively optimality optimising optimistic optimizers optimizing optionally optography optologist optomeninx optometric opulencies opuntiales
11-letter words (67)
opacousness opalescence opeidoscope openability openairness opencircuit openhearted openmouthed operability operational operatively operativity operatrices operculated operoseness ophicalcite ophiography ophiologist ophiomorpha ophiophagus ophiophobia ophiosaurus ophiuroidea ophthalitis ophthalmiac ophthalmist ophthalmite opiateproof opiconsivia opiliaceous opinability opinatively opiniatedly opiniatrety opinionable opinionaire opinionated opiophagism opisthocome opisthocomi opisthodome opisthodont opobalsamum oppignerate oppignorate opportunely opportunism opportunist opportunity oppositions oppositious oppressible opprobriate opprobrious opprobriums oppugnation opsonifying opsonometry optableness optionality optionalize optoisolate optokinetic optological optometries optometrist opuntiaceae
12-letter words (60)
openhandedly operatically operationism operationist operculiform ophicephalus ophichthyoid ophicleidean ophicleidist ophidiomania ophidologist ophioglossum ophiolatrous ophiological ophiomorphic ophiophagous ophiophilism ophiophilist ophiopluteus ophiuroidean ophthalmagra ophthalmious ophthalmitic ophthalmitis ophthalmopod opiniastrety opiniastrous opiniatively opinionately opinionative opisthodetic opisthodomos opisthodomus opisthoglyph opisthograph opisthoparia opisthorchis opisthosomal opisthotonic opisthotonos opisthotonus opportunists opposability oppositeness oppositional oppositively oppressively opprobriated opsoniferous opsonization opsonophilia opsonophilic opsonophoric opthalmology optimistical optimization optoacoustic optometrical optometrists optotechnics
13-letter words (55)
opacification openendedness openheartedly openmouthedly operabilities operationally operativeness ophicephaloid ophichthyidae ophidiophobia ophiomorphous ophiostaphyle ophthalaiater ophthalmalgia ophthalmalgic ophthalmiater ophthalmocele ophthalmolith ophthalmology ophthalmostat ophthalmotomy opiniatreness opinionatedly opinionedness opisthobranch opisthocoelia opisthocomine opisthocomous opisthoglossa opisthoglypha opisthography opisthogyrate opisthogyrous opisthoparian opisthophagic opisthoporeia opisthothelae opisthotonoid opportuneless opportuneness opportunistic opportunities oppositionary oppositionism oppositionist oppositipolar oppressionist opprobriating opprobriously opsonotherapy opthalmologic opthalmoplegy opthalmoscopy opticociliary optimizations
14-letter words (42)
openhandedness operationalism operationalist operculiferous operculigenous operculigerous ophicephalidae ophiobatrachia ophioglossales ophresiophobia ophthalmectomy ophthalmocopia ophthalmodynia ophthalmologic ophthalmometer ophthalmometry ophthalmopathy ophthalmophore ophthalmorrhea ophthalmoscope ophthalmoscopy ophthalmotrope opiniativeness opinionatively opisthocoelian opisthocoelous opisthocomidae opisthodomoses opisthogastric opisthoglossal opisthoglyphic opisthographal opisthographic opposabilities oppositionists oppositionless oppositiveness oppressiveness opsonification opticochemical optimistically optoelectronic
15-letter words (31)
openheartedness openmouthedness ophioglossaceae ophthalmetrical ophthalmiatrics ophthalmography ophthalmologies ophthalmologist ophthalmometric ophthalmoplasty ophthalmoplegia ophthalmoplegic ophthalmoptosis ophthalmosaurus ophthalmoscopes ophthalmoscopic ophthalmostasis opinionatedness opisthobranchia opisthoglossate opisthoglyphous opisthognathism opisthognathous opisthorchiasis oppositiflorous oppositifolious oppositipinnate opprobriousness opthalmophorium opticopapillary opticopupillary
Frequently asked questions
How many words that start with OP are there?
Our word list contains 722 words that start with OP, out of 382,657 entries in total. They run from 2 to 15 letters, and the 8-letter group is the largest with 113 words.
What are the longest words that start with OP?
The longest are openheartedness (15 letters), openmouthedness (15 letters) and ophioglossaceae (15 letters).
Which words that start with OP score highest in Scrabble?
By raw letter values, the top scorers on this page are ophthalmography (34 points), ophthalmopathy (32 points) and ophthalmectomy (31 points) — before any letter or word multipliers. One honest caveat: this list is a broad English word list, so a few rare or technical entries appear that official game dictionaries (and Wordle’s answer list) do not accept. Always check a play against the dictionary your game uses.
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