15-Letter Words Matching R_____T________

There are 20 15-letter words that match R_____T________. 8 are common words, such as RECAPITULATIONS and RECONSTITUTIONS. A rarer one is RHEUMATOLOGISTS. 4 words contain a doubled letter.

Full list 20

recapitulationsreconstitutionsreconstructionsrecrystallizingrepetitiousnessrevolutionariesrevolutionisingrevolutionizingreconstructiblerumbustiousnessradiostrontiumsreflectometriesrefractometriesremonetizationsremonstrativelyrepristinationsrespectablenessrevolutionarilyrevolutionizersrheumatologists

About this list

Words
20 (8 common words)
Common example
recapitulations
Rare example
rheumatologists
Doubled letters
4
Ending in S
14

Questions

How many 15-letter words matching r_____t________ are there?

20. 8 of them are common words.

What is a common example?

RECAPITULATIONS is among the common words in this set.