13-Letter Words Matching ____R_____A__

There are 45 13-letter words that match ____R_____A__. 16 are common words, such as DISCRETIONARY and HETEROSEXUALS. A rarer one is SUPERSPECIALS. In this set, E is the most frequent open letter (41 words). 4 words contain a doubled letter.

Full list 45

Common words

discretionaryheterosexualsinstrumentalsintermarriageprocrastinatequadruplicatesuperabundantsuperhighwayssupernaturalssupernumerarysupersaturatetheoreticians
discretionaryheterosexualsinstrumentalsintermarriageprocrastinatequadruplicatesuperabundantsuperhighwayssupernaturalssupernumerarysupersaturatetheoreticiansundercarriageunderestimateundergraduateveterinariansanthropophagianthropophagyconcretionarydisarticulateimparipinnateinterdigitateinterlaminateinterlanguageinterosculatemajoritarianssuperdominantsuperordinatecocarboxylasedecarboxylasedecarboxylatehemorrhoidalshyperarousalshypervigilantinterglacialsintermembraneintermountaininterpermeateinterstadialsmisarticulatequadrumviratesclerodermatasubprincipalssupermilitantsuperspecials

About this list

Words
45 (16 common words)
Common example
discretionary
Rare example
superspecials
Doubled letters
4
Ending in S
13
Most frequent letter
E (41)

Questions

How many 13-letter words matching ____r_____a__ are there?

45. 16 of them are common words.

What is a common example?

DISCRETIONARY is among the common words in this set.