12-Letter Words Matching ________OI__

There are 29 12-letter words that match ________OI__. 7 are common words, such as COUNTERFOILS and COUNTERPOINT. A rarer one is THEATERGOING. In this set, R is the most frequent open letter (23 words). 4 words contain a doubled letter.

Full list 29

Common words

counterfoilscounterpointcounterpoisehaemorrhoidshypothyroidsparathyroidsparatyphoidsantherozoidsbastinadoingfrankalmoignhyperboloidshypocycloids
counterfoilscounterpointcounterpoisehaemorrhoidshypothyroidsparathyroidsparatyphoidsantherozoidsbastinadoingfrankalmoignhyperboloidshypocycloidsscorpaenoidsbarricadoingcannabinoidscarbonadoingconcertgoingcrescendoingcrystalloidsdiphtheroidsheteroploidsheteroploidyhypodiploidyketosteroidsmanifestoingmetasequoiasoverexploitssuperheroinetheatergoing

About this list

Words
29 (7 common words)
Common example
counterfoils
Rare example
theatergoing
Doubled letters
4
Ending in S
16
Most frequent letter
R (23)

Questions

How many 12-letter words matching ________oi__ are there?

29. 7 of them are common words.

What is a common example?

COUNTERFOILS is among the common words in this set.