15-Letter Words Matching ____RT_________

There are 23 15-letter words that match ____RT_________. 5 are common words, such as ASSERTIVENESSES and BIPARTISANSHIPS. A rarer one is REFORTIFICATION. 8 words contain a doubled letter.

Full list 23

assertivenessesbipartisanshipsdepartmentalizehyperthyroidismunearthlinessesdepartmentalismdesertificationdisarticulatingimportunatenesslibertarianismsopportunenessesuncertainnessesdecertificationdisarticulationdivertissementseffortfulnessesexportabilitieshypertonicitiesimmortalizationintertwinementsmisarticulatingrecertificationrefortification

About this list

Words
23 (5 common words)
Common example
assertivenesses
Rare example
refortification
Doubled letters
8
Ending in S
12

Questions

How many 15-letter words matching ____rt_________ are there?

23. 5 of them are common words.

What is a common example?

ASSERTIVENESSES is among the common words in this set.