15-Letter Words Matching ____R_____M____

There are 13 15-letter words that match ____R_____M____. 4 are common words, such as DISARRANGEMENTS and DISGRUNTLEMENTS. A rarer one is SUPERPHENOMENON. In this set, E is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 13

disarrangementsdisgruntlementsprearrangementsunderstatementsheterochromaticheterochromatinoverrefinementspleuropneumoniachlorpropamidesdivertissementsintertwinementssemiretirementssuperphenomenon

About this list

Words
13 (4 common words)
Common example
disarrangements
Rare example
superphenomenon
Doubled letters
4
Ending in S
9
Most frequent letter
E (13)

Questions

How many 15-letter words matching ____r_____m____ are there?

13. 4 of them are common words.

What is a common example?

DISARRANGEMENTS is among the common words in this set.