15-Letter Words Matching ___A_________T_

There are 13 15-letter words that match ___A_________T_. 5 are common words, such as DISAPPOINTMENTS and DISARRANGEMENTS. A rarer one is PARASITOLOGISTS. 3 words contain a doubled letter.

Full list 13

disappointmentsdisarrangementsnonavailabilityprearrangementsstraightjacketsincalculabilityorganophosphateunmanageabilitybioavailabilitymegagametophytemetafictionistsnonachievementsparasitologists

About this list

Words
13 (5 common words)
Common example
disappointments
Rare example
parasitologists
Doubled letters
3
Ending in S
7

Questions

How many 15-letter words matching ___a_________t_ are there?

13. 5 of them are common words.

What is a common example?

DISAPPOINTMENTS is among the common words in this set.