7-Letter Words Matching ____O_I

There are 19 7-letter words that match ____O_I. 5 are common words, such as MAFIOSI and RAVIOLI. A rarer one is RHIZOPI. 2 words contain a doubled letter.

Full list 19

mafiosiraviolisignorispumonitortonialveolicannolidystopitripolibrocolicanzoniepigonimodiolinegronipadronipierogipignolirabbonirhizopi

About this list

Words
19 (5 common words)
Common example
mafiosi
Rare example
rhizopi
Doubled letters
2
Ending in S
0

Questions

How many 7-letter words matching ____o_i are there?

19. 5 of them are common words.

What is a common example?

MAFIOSI is among the common words in this set.