9-Letter Words Matching ______O_N

There are 66 9-letter words that match ______O_N. 30 are common words, such as AFTERNOON and BREAKDOWN. A rarer one is WATERWORN. In this set, R is the most frequent open letter (42 words). 18 words contain a doubled letter.

Full list 66

Common words

afternoonbreakdownclampdowncountdowncrackdowncrosstowneiderdownfirstbornforeknownforesworngreenhornhomegrown
afternoonbreakdownclampdowncountdowncrackdowncrosstowneiderdownfirstbornforeknownforesworngreenhornhomegrownhoneymoonknockdownmicroloannightgownoverblownoverflownovergrownpronghornprotozoanprotozoonshakedownshorthornspelldownstillbornswansdowntouchdownunbeknownwindblownalpenhornanthozoanbarracoonbroomcornbuckthornclavicornclimbdownearthbornforeshownhartshornheliozoanhydantoinhydrozoaninterjoinkrummhornlongicornmisthrownpantaloonphenytoinsaskatoonsoupspoonstinkhornsweetcornallantoinbringdownclosedownfirethornhandblownoutthrownpastedownphasedownpickaroonsporozoansporozoontretinoinwaterworn

About this list

Words
66 (30 common words)
Common example
afternoon
Rare example
waterworn
Doubled letters
18
Ending in S
0
Most frequent letter
R (42)

Questions

How many 9-letter words matching ______o_n are there?

66. 30 of them are common words.

What is a common example?

AFTERNOON is among the common words in this set.