There are a total of 408 7-letter words containing 'io', and the number may vary in different dictionaries. You can specify the dictionary and order.
- abioses 10
- abiosis 10
- abiotic 13
- achiote 12
- actions 11
- adagios 10
- adioses 8
- agrions 10
- alation 9
- amnions 12
- amniote 11
- amotion 11
- angioma 13
- anionic 12
- antlion 10
- anxious 16
- apriori 10
- ariosos 7
- auction 12
- avionic 15
- bagnios 13
- barrios 10
- basions 11
- bastion 11
- bilious 12
- billion 13
- biobank 18
- biochar 15
- biochip 18
- biocide 14
- biodata 11
- biofilm 17
- biofuel 15
- biogens 13
- biogeny 15
- bioherm 15
- biology 15
- biomass 13
- bionics 14
- bionomy 16
- biontic 14
- biopics 16
- biopsic 16
- bioptic 16
- biotech 15
- biotics 13
- biotins 11
- biotite 10
- biotope 13
- biotron 11
- biotype 15
- braccio 16
- brioche 15
- bullion 14
- bunions 13
- cabrios 13
- camions 14
- campion 17
- caption 14
- carioca 13
- cariole 11
- carious 11
- carrion 11
- cations 11
- caution 12
- cession 11
- chariot 12
- cheerio 12
- cheviot 16
- chorion 13
- clarion 12
- coition 11
- copious 14
- criollo 12
- cullion 14
- curiosa 11
- curious 12
- cushion 14
- daimios 11
- dariole 9
- devious 13
- diction 12
- diobols 12
- diocese 11
- diopter 11
- dioptre 11
- diorama 11
- diorite 8
- dioxane 16
- dioxans 16
- dioxide 16
- dioxids 16
- dioxins 16
- dithiol 11
- donatio 9
- dubious 13
- dupions 13
- durions 10
- ebriose 10
- ebrious 11
- edition 9
- elation 9
- elision 9
- elusion 10
- elution 10
- emotion 11
- enation 9
- envious 13
- eobiont 11
- erasion 8
- erosion 8
- estriol 8
- ethions 10
- evasion 12
- faction 14
- fanions 12
- fashion 13
- fermion 14
- fiction 14
- fission 11
- flexion 19
- fluxion 20
- folioed 12
- foliole 12
- foliose 11
- folious 12
- furioso 11
- furious 12
- fusions 12
- gabions 13
- galiots 10
- galliot 11
- gliomas 13
- gobioid 13
- gorgios 11
- grunion 12
- haviors 13
- haviour 14
- hellion 12
- hemiola 13
- heriots 9
- idiotic 11
- impious 14
- iodated 9
- iodates 8
- iodides 9
- iodines 9
- iodised 9
- iodises 8
- iodisms 11
- iodized 18
- iodizer 17
- iodizes 17
- iolites 8
- ionised 9
- ioniser 8
- ionises 8
- ioniums 12
- ionized 18
- ionizer 17
- ionizes 17
- ionogen 11
- ionomer 11
- ionones 9
- jillion 19
- juniors 18
- kations 12
- lampion 15
- lection 12
- legions 11
- lesions 9
- lioness 9
- lionise 9
- lionize 18
- logions 11
- lotions 9
- mafiosi 13
- mafioso 13
- manioca 14
- maniocs 14
- mansion 12
- meioses 10
- meiosis 10
- meiotic 13
- mention 12
- million 13
- minions 12
- miotics 13
- mission 11
- modioli 12
- morions 11
- morrion 11
- motions 11
- moviola 15
- mullion 14
- munnion 14
- nasions 9
- nations 9
- nimious 12
- niobate 11
- niobium 15
- niobous 12
- notions 9
- noxious 16
- nuncios 13
- obvious 15
- officio 16
- opinion 12
- opioids 11
- options 11
- oration 8
- orioles 8
- osmious 11
- ostiole 8
- ovation 12
- paction 14
- passion 11
- patriot 10
- paviors 14
- paviour 15
- pension 12
- pereion 11
- periods 11
- petiole 11
- petitio 10
- physios 14
- pillion 13
- pinions 12
- piolets 11
- pioneer 11
- piosity 12
- piously 14
- plosion 12
- portion 11
- potions 11
- preriot 10
- priorly 13
- proprio 13
- psionic 14
- pulsion 13
- radioed 9
- radioes 8
- rampion 14
- rations 8
- ravioli 12
- regions 10
- restios 7
- reunion 10
- rioters 7
- rioting 10
- riotous 8
- ronions 9
- rosolio 8
- rubious 12
- ruction 12
- sanious 9
- saviors 11
- saviour 12
- sealion 9
- section 11
- senecio 11
- seniors 8
- serious 8
- session 8
- signior 10
- simioid 11
- simious 11
- solions 9
- station 8
- studios 9
- suasion 9
- suction 12
- symbion 16
- symbiot 15
- taction 11
- talions 9
- tampion 14
- tapioca 13
- tedious 9
- tenioid 9
- tension 9
- ternion 9
- thiolic 13
- thionic 13
- thionin 11
- thionyl 13
- tompion 14
- torsion 8
- triodes 8
- triolet 8
- trioses 7
- trioxid 15
- tuition 9
- unction 13
- variola 12
- variole 12
- various 12
- version 12
- vibrion 15
- vibrios 14
- vicious 15
- vidiots 12
- violate 12
- violent 13
- violets 12
- violins 13
- violist 12
- violone 13
- virions 12
- visions 12
- vitriol 12
- wanions 12
- warrior 10
- zillion 19
- aeradio 8
- cardios 10
- glioses 8
- gliosis 8
- liriope 9
- miocene 11
- niobite 9
- oidioid 9
- turions 7
- abusion 9
- alerion 7
- amation 9
- arborio 9
- aziones 16
- badious 10
- baguios 10
- binious 9
- biodots 10
- biofact 14
- biophor 14
- bivious 12
- cantion 9
- cariose 9
- cesious 9
- chilioi 12
- coction 11
- corious 9
- crioses 9
- diorism 10
- doppios 12
- emption 11
- etaerio 7
- ethiops 12
- etiolin 7
- exomion 16
- fiorins 10
- franion 10
- fushion 13
- gillion 8
- giocoso 10
- hallion 10
- hemione 12
- histrio 10
- idiotcy 13
- invious 10
- iodiser 8
- ioduret 8
- lioncel 9
- lionels 7
- lionets 7
- lionism 9
- loriots 7
- mandioc 12
- mersion 9
- miction 11
- miombos 13
- mixtion 16
- murrion 9
- obelion 9
- onioned 8
- orarion 7
- paiocke 15
- paiocks 15
- papilio 11
- periost 9
- pioners 9
- pioneys 12
- pionies 9
- pioning 10
- plerion 9
- pompion 13
- pterion 9
- pumpion 13
- rection 9
- riotise 7
- riotize 16
- rullion 7
- runnion 7
- sciolto 9
- scolion 9
- semeion 9
- sepiost 9
- skolion 11
- sliotar 7
- tercios 9
- tersion 7
- tordion 8
- triones 7
- trionym 12
- turdion 8
- ultions 7
- unition 7
- ustions 7
- violers 10
There are 408 7-letter words containing io in the well-known word game dictionary, 305 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 393 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 314 in the Words with Friends (WWF) dictionary.
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