4-Letter Words Matching _O_I

There are 17 4-letter words that match _O_I. 4 are common words, such as FOCI and LOCI. A rarer one is ZORI. In this set, R is the most frequent open letter (5 words). 0 words contain a doubled letter.

Full list 17

focilocisoliyogicolilotinodisoritopitoriyoniconimodimominorirotizori

About this list

Words
17 (4 common words)
Common example
foci
Rare example
zori
Doubled letters
0
Ending in S
0
Most frequent letter
R (5)

Questions

How many 4-letter words matching _o_i are there?

17. 4 of them are common words.

What is a common example?

FOCI is among the common words in this set.