12-Letter Words Ending in IS

There are 85 12-letter words that end in IS. 8 are common words, such as APPENDICITIS and AVITAMINOSIS. A rarer one is UROLITHIASIS. In this set, O is the most frequent open letter (68 words). 8 words contain a doubled letter.

Full list 85

Common words

appendicitisavitaminosiselectrolysisencephalitismisdiagnosisosteoporosisoveremphasistuberculosisaeroneurosisagamogenesisanamorphosisangiogenesis
appendicitisavitaminosiselectrolysisencephalitismisdiagnosisosteoporosisoveremphasistuberculosisaeroneurosisagamogenesisanamorphosisangiogenesisanticathexisautohypnosisbilharziasisbiosynthesiscaenogenesiscataphoresisendocarditisepanorthosisepimorphosisfibrinolysisfurunculosisglycogenesishallucinosishemodialysishistogenesishyperostosishypnogenesiskaryokinesislenticularisleucocytosisleucopoiesislymphangitisophthalmitisorthogenesisosteogenesispalingenesispancreatitisparasynapsispathogenesispericarditisperineuritisphagocytosisphotokinesisphytogenesispolyneuritispsychognosispyonephritissalpiglossissarcomatosissporogenesistrombidiasisuncinariasiszygapophysisanaerobiosisanaplasmosisandrogenesiscladogenesiscyanogenesiscyclogenesisdouroucoulisendometritisenterobiasisepididymitisfascioliasisfolliculitishemerocallishyperkinesisleukocytosisleukopoiesismacrocytosismorphallaxisotosclerosisoveranalysispaedogenesispetrogenesispolyhedrosispseudocyesisschwarmereisspaghettinissynaesthesissynarthrosistrophallaxisurolithiasis

About this list

Words
85 (8 common words)
Common example
appendicitis
Rare example
urolithiasis
Doubled letters
8
Ending in S
85
Most frequent letter
O (68)

Questions

How many 12-letter words ending in is are there?

85. 8 of them are common words.

What is a common example?

APPENDICITIS is among the common words in this set.