15-Letter Words Matching ______OS_______

There are 23 15-letter words that match ______OS_______. 2 are common words, such as TYRANNOSAURUSES and UNPREPOSSESSING. A rarer one is TRYPANOSOMIASES. In this set, I is the most frequent open letter (21 words). 5 words contain a doubled letter.

Full list 23

tyrannosaurusesunprepossessingcorticosteroidscorticosteronesichthyosaurusesjuxtapositionalmacrocosmicallymicrocosmicallymusculoskeletalschistosomiasesschistosomiasisspectroscopicaltrypanosomiasisaluminosilicatebronchoscopistscarcinosarcomasdecomposabilityelectrosurgicalgrandiosenessesichthyosauriansspectroscopiststranspositionaltrypanosomiases

About this list

Words
23 (2 common words)
Common example
tyrannosauruses
Rare example
trypanosomiases
Doubled letters
5
Ending in S
13
Most frequent letter
I (21)

Questions

How many 15-letter words matching ______os_______ are there?

23. 2 of them are common words.

What is a common example?

TYRANNOSAURUSES is among the common words in this set.