14-Letter Words Matching _____A_____T__

There are 18 14-letter words that match _____A_____T__. 4 are common words, such as OSTEOARTHRITIS and PROCRASTINATED. A rarer one is SPERMATOPHYTIC. 2 words contain a doubled letter.

Full list 18

osteoarthritisprocrastinatedprocrastinatesprocrastinatordiffractometerosteoarthriticspermatophytesclairaudientlycyanoacrylatescycloaliphaticdiffractometryhyperaestheticmegakaryocytesmegakaryocyticnoncharismaticpolycarbonatesscholasticatesspermatophytic

About this list

Words
18 (4 common words)
Common example
osteoarthritis
Rare example
spermatophytic
Doubled letters
2
Ending in S
7

Questions

How many 14-letter words matching _____a_____t__ are there?

18. 4 of them are common words.

What is a common example?

OSTEOARTHRITIS is among the common words in this set.