15-Letter Words Matching ____R_____L____

There are 19 15-letter words that match ____R_____L____. 4 are common words, such as DISGRACEFULNESS and HYPERVENTILATED. A rarer one is SUPERSTIMULATES. In this set, E is the most frequent open letter (18 words). 8 words contain a doubled letter.

Full list 19

disgracefulnesshyperventilatedhyperventilatesunderprivilegeddistrustfulnessmistrustfulnesssuperficialnessantiradicalismsdistressfulnessheterothallismshypercoagulablehypersomnolencehyperstimulatedhyperstimulatesintercorrelatedintercorrelatespararosanilinessuperstimulatedsuperstimulates

About this list

Words
19 (4 common words)
Common example
disgracefulness
Rare example
superstimulates
Doubled letters
8
Ending in S
12
Most frequent letter
E (18)

Questions

How many 15-letter words matching ____r_____l____ are there?

19. 4 of them are common words.

What is a common example?

DISGRACEFULNESS is among the common words in this set.