13-Letter Words Matching R_G__________

There are 12 13-letter words that match R_G__________. 7 are common words, such as REGENERATIONS and REGIMENTATION. A rarer one is RUGGEDIZATION. 5 words contain a doubled letter.

Full list 12

regenerationsregimentationregistrationsregurgitatingregurgitationrighteousnessroguishnessesregretfulnessregardfulnessregionalisticregionalizingruggedization

About this list

Words
12 (7 common words)
Common example
regenerations
Rare example
ruggedization
Doubled letters
5
Ending in S
6

Questions

How many 13-letter words matching r_g__________ are there?

12. 7 of them are common words.

What is a common example?

REGENERATIONS is among the common words in this set.