15-Letter Words Matching ___A_________S_

There are 13 15-letter words that match ___A_________S_. 3 are common words, such as HUMANITARIANISM and TOTALITARIANISM. A rarer one is UNFAVORABLENESS. In this set, N is the most frequent open letter (13 words). 9 words contain a doubled letter.

Full list 13

humanitarianismtotalitarianismtreacherousnessbroadmindednessdepartmentalismatrabiliousnessclearheadednessequalitarianismexhaustlessnessparadoxicalnesspleasurablenessstraitlacednessunfavorableness

About this list

Words
13 (3 common words)
Common example
humanitarianism
Rare example
unfavorableness
Doubled letters
9
Ending in S
9
Most frequent letter
N (13)

Questions

How many 15-letter words matching ___a_________s_ are there?

13. 3 of them are common words.

What is a common example?

HUMANITARIANISM is among the common words in this set.