12-Letter Words Matching _OI_________

There are 19 12-letter words that match _OI_________. 10 are common words, such as BOILERMAKERS and BOILERPLATES. A rarer one is VOIDABLENESS. In this set, S is the most frequent open letter (16 words). 6 words contain a doubled letter.

Full list 19

boilermakersboilerplatesboisterouslycoincidencescoincidentalcoinsurancesmoisturizersmoisturizingpointillismspointillistspoikilothermcoincidentlymoisturisingnoisemakingspointtillistroisterouslytoilsomenessvoicefulnessvoidableness

About this list

Words
19 (10 common words)
Common example
boilermakers
Rare example
voidableness
Doubled letters
6
Ending in S
11
Most frequent letter
S (16)

Questions

How many 12-letter words matching _oi_________ are there?

19. 10 of them are common words.

What is a common example?

BOILERMAKERS is among the common words in this set.