9-Letter Words Matching ____X___S

There are 18 9-letter words that match ____X___S. 7 are common words, such as BISEXUALS and MONOXIDES. A rarer one is SUBOXIDES. 2 words contain a doubled letter.

Full list 18

bisexualsmonoxidesobnoxiousparoxysmsperoxidespreexistsrelaxantsindexingsinnoxiouspyroxenessiloxanestrioxidesalkoxidesektexinesendexinesinfixionsnaloxonessuboxides

About this list

Words
18 (7 common words)
Common example
bisexuals
Rare example
suboxides
Doubled letters
2
Ending in S
18

Questions

How many 9-letter words matching ____x___s are there?

18. 7 of them are common words.

What is a common example?

BISEXUALS is among the common words in this set.