5-Letter Words Matching __L_O

There are 21 5-letter words that match __L_O. 9 are common words, such as CELLO and FOLIO. A rarer one is WILCO. In this set, I is the most frequent open letter (9 words). 9 words contain a doubled letter.

Full list 21

cellofoliohallohellohulloigloojellopoliosalvobilbopaleosoldofilloheliohillohollomoltosulfovulgowilcodildo

About this list

Words
21 (9 common words)
Common example
cello
Rare example
wilco
Doubled letters
9
Ending in S
0
Most frequent letter
I (9)

Questions

How many 5-letter words matching __l_o are there?

21. 9 of them are common words.

What is a common example?

CELLO is among the common words in this set.