13-Letter Words Matching ______RM_____

There are 20 13-letter words that match ______RM_____. 10 are common words, such as BLABBERMOUTHS and COUNTERMANDED. A rarer one is PARANORMALITY. In this set, T is the most frequent open letter (18 words). 2 words contain a doubled letter.

Full list 20

blabbermouthscountermandedindeterminacyindeterminatephilharmonicsquartermasterreaffirmationredeterminingsemipermeableuninformativecountermelodycounterminingindeterminismsemipermanentantiformalistcountermovingdiathermanousexothermicityindeterministparanormality

About this list

Words
20 (10 common words)
Common example
blabbermouths
Rare example
paranormality
Doubled letters
2
Ending in S
3
Most frequent letter
T (18)

Questions

How many 13-letter words matching ______rm_____ are there?

20. 10 of them are common words.

What is a common example?

BLABBERMOUTHS is among the common words in this set.