15-Letter Words Matching ___R______R____

There are 15 15-letter words that match ___R______R____. 3 are common words, such as MICROELECTRONIC and MICROMETEORITES. A rarer one is ULTRADEMOCRATIC. In this set, T is the most frequent open letter (14 words). 4 words contain a doubled letter.

Full list 15

microelectronicmicrometeoritesnitroglycerinesultrasonographycitriculturistsfloriculturistsintracerebrallymicrobarographsmicroelectrodesmicrometeoriticmicrometeoroidsoverexaggeratedoverexaggeratesultracommercialultrademocratic

About this list

Words
15 (3 common words)
Common example
microelectronic
Rare example
ultrademocratic
Doubled letters
4
Ending in S
8
Most frequent letter
T (14)

Questions

How many 15-letter words matching ___r______r____ are there?

15. 3 of them are common words.

What is a common example?

MICROELECTRONIC is among the common words in this set.