14-Letter Words Matching D_F___________

There are 18 14-letter words that match D_F___________. 4 are common words, such as DEFINITENESSES and DEFORESTATIONS. A rarer one is DIFFRACTOMETRY. In this set, E is the most frequent open letter (18 words). 12 words contain a doubled letter.

Full list 18

definitenessesdeforestationsdifferentiateddifferentiatesdefenestrationdefibrillationdefibrillatorsdefinitivenessdifferentiabledifferentiallydifferentiatordiffractometerdefeminizationdefenestratingdefervescencesdefibrillatingdefibrinationsdiffractometry

About this list

Words
18 (4 common words)
Common example
definitenesses
Rare example
diffractometry
Doubled letters
12
Ending in S
7
Most frequent letter
E (18)

Questions

How many 14-letter words matching d_f___________ are there?

18. 4 of them are common words.

What is a common example?

DEFINITENESSES is among the common words in this set.