15-Letter Words Matching U____________S_

There are 20 15-letter words that match U____________S_. 5 are common words, such as UNCONSCIOUSNESS and UNDERHANDEDNESS. A rarer one is UNMITIGATEDNESS. 18 words contain a doubled letter.

Full list 20

unconsciousnessunderhandednessunobtrusivenessunrighteousnessunwholesomenessubiquitarianismunassertivenessunequivocalnessunseaworthinessultraliberalismunalterablenessunclimbablenessunconcernednessundesirablenessunendurablenessunfavorablenessunforgivingnessuninhibitednessunmelodiousnessunmitigatedness

About this list

Words
20 (5 common words)
Common example
unconsciousness
Rare example
unmitigatedness
Doubled letters
18
Ending in S
18

Questions

How many 15-letter words matching u____________s_ are there?

20. 5 of them are common words.

What is a common example?

UNCONSCIOUSNESS is among the common words in this set.