14-Letter Words Matching ________A___S_

There are 17 14-letter words that match ________A___S_. 2 are common words, such as IMMATERIALNESS and METHODICALNESS. A rarer one is TYRANNICALNESS. In this set, E is the most frequent open letter (16 words). 14 words contain a doubled letter.

Full list 17

immaterialnessmethodicalnessapocryphalnessartificialnessradiobroadcastreciprocalnesstheatricalnessaccidentalnessbeneficialnessdiabolicalnessdogmaticalnessheterothallismhistoricalnessreactionaryismsuperhumannesstarsometatarsityrannicalness

About this list

Words
17 (2 common words)
Common example
immaterialness
Rare example
tyrannicalness
Doubled letters
14
Ending in S
13
Most frequent letter
E (16)

Questions

How many 14-letter words matching ________a___s_ are there?

17. 2 of them are common words.

What is a common example?

IMMATERIALNESS is among the common words in this set.