4-Letter Words Matching _OI_

There are 20 4-letter words that match _OI_. 13 are common words, such as BOIL and COIF. A rarer one is ZOIC. In this set, L is the most frequent open letter (9 words). 0 words contain a doubled letter.

Full list 20

boilcoifcoilcoinfoiljoinloinmoilpoisroilsoiltoilvoidcoirdoitfoinnoilnoirtoitzoic

About this list

Words
20 (13 common words)
Common example
boil
Rare example
zoic
Doubled letters
0
Ending in S
1
Most frequent letter
L (9)

Questions

How many 4-letter words matching _oi_ are there?

20. 13 of them are common words.

What is a common example?

BOIL is among the common words in this set.