15-Letter Words Matching ____R_________T

There are 16 15-letter words that match ____R_________T. 4 are common words, such as INSTRUMENTALIST and INSURRECTIONIST. A rarer one is SUPERSPECIALIST. 2 words contain a doubled letter.

Full list 16

instrumentalistinsurrectionistinterventionistunderemploymentarboriculturistexperimentalistresurrectionistsupernaturalistunderinvestmentantirationalistgovernmentalisthyperexcitementsuperbureaucratsuperconvenientsupergovernmentsuperspecialist

About this list

Words
16 (4 common words)
Common example
instrumentalist
Rare example
superspecialist
Doubled letters
2
Ending in S
0

Questions

How many 15-letter words matching ____r_________t are there?

16. 4 of them are common words.

What is a common example?

INSTRUMENTALIST is among the common words in this set.