There are 267 words with the prefix EXO 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 9-letter words (65 of them); the spread is 2 of them 4 letters long, 4 of them 5 letters long, 13 of them 6 letters long, 23 of them 7 letters long, and more up to 15 letters. The longest entries are exoerythrocytic, exobasidiaceae and exocannibalism. 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 prefix EXO- means outside or external (exoskeleton, exothermic) — three examples from this page: exoascus, exocarp, exocarps.
The full list
4-letter words (2)
exon exor
5-letter words (4)
exode exody exons exopt
6-letter words (13)
exodes exodic exodoi exodos exodus exogen exolve exomis exoner exonic exonym exopod exotic
7-letter words (23)
exocarp exocone exoderm exodist exodium exogamy exogens exogeny exogyra exolete exomion exonian exonyms exopods exorate exordia exormia exosmic exostra exotery exotica exotics exotism
8-letter words (44)
exoascus exocarps exocline exocoele exocrine exocytic exoderms exodists exodromy exoduses exoergic exogamic exogenae exogenic exograph exolemma exomions exomises exonship exonumia exophagy exoplasm exorable exorcise exorcism exorcist exorcize exordial exordium exordize exornate exortion exosmose exosperm exospore exossate exostema exostome exostrae exoteric exotheca exotisms exotoxic exotoxin
9-letter words (65)
exocardia exochorda exoclinal exocoelar exocoelic exocoelom exocoelum exocoetus exocrines exoculate exocyclic exodermal exodermis exodontia exodontic exodromic exoenzyme exogamies exogamous exogenism exogenous exogonium exolution exonerate exoneural exopathic exophasia exophasic exophoria exophoric exopodite exorbital exorcised exorciser exorcises exorcisms exorcista exorcists exorcized exorcizer exorcizes exordiums exorganic exorhason exosepsis exosmoses exosmosis exosmotic exosphere exosporal exospores exosseous exostosed exostoses exostosis exostotic exoterica exoterics exothecal exoticism exoticist exoticity exotoxins exotropia exotropic
10-letter words (47)
exoascales exobiology exocardiac exocardial exocentric exochorion exocolitis exoculated exocyclica exocytosis exodontics exodontist exoenzymic exogastric exogenetic exomorphic exomphalos exomphalus exonarthex exonerated exonerates exonerator exoneretur exophagous exopoditic exorbitant exorbitate exorcisers exorcising exorcismal exorcisory exorcistic exorcizing exornation exospheres exospheric exosporium exosporous exoterical exothecate exothecium exothermal exothermic exotically exoticness exotospore exotropism
11-letter words (28)
exoascaceae exobasidium exoccipital exocoetidae exoculating exoculation exocycloida exogenously exognathion exognathite exometritis exomorphism exomphalous exonerating exoneration exonerative exonerators exonuclease exoperidium exorability exorbitance exorbitancy exoskeletal exoskeleton exostracism exostracize exotericism exothermous
12-letter words (27)
exoarteritis exoascaceous exobiologist exocrinology exogastritis exomologesis exonerations exopeptidase exophthalmia exophthalmic exophthalmos exophthalmus exopterygota exopterygote exorableness exorbitantly exorbitation exorcisation exorcisement exorcistical exorcization exorcizement exosculation exospherical exoterically exothermally exoticalness
13-letter words (6)
exobasidiales exobiological exobiologists exocataphoria exopterygotic exothermicity
14-letter words (7)
exobasidiaceae exocannibalism exocrinologies exogastrically exopterygotism exopterygotous exothermically
15-letter words (1)
exoerythrocytic
Frequently asked questions
How many words with the prefix EXO are there?
Our word list contains 267 words with the prefix EXO, out of 382,657 entries in total. They run from 4 to 15 letters, and the 9-letter group is the largest with 65 words.
What are the longest words with the prefix EXO?
The longest are exoerythrocytic (15 letters), exobasidiaceae (14 letters) and exocannibalism (14 letters).
Which words with the prefix EXO score highest in Scrabble?
By raw letter values, the top scorers on this page are exoerythrocytic (35 points), exoenzymic (33 points) and exorcizement (32 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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