12-Letter Words Matching ________R_M_

There are 13 12-letter words that match ________R_M_. 1 are common words, such as CANDELABRUMS and OSCILLOGRAMS. A rarer one is SCATTERGRAMS. 3 words contain a doubled letter.

Full list 13

candelabrumsoscillogramsspectrogramsstereochromestereochromyadrenochromearteriogramselectrogramsfluorochromeneurofibromaoverprogramspittosporumsscattergrams

About this list

Words
13 (1 common words)
Common example
candelabrums
Rare example
scattergrams
Doubled letters
3
Ending in S
8

Questions

How many 12-letter words matching ________r_m_ are there?

13. 1 of them are common words.

What is a common example?

CANDELABRUMS is among the common words in this set.