15-Letter Words Matching ________A____S_

There are 18 15-letter words that match ________A____S_. 3 are common words, such as APPROPRIATENESS and CONSIDERATENESS. A rarer one is SUPERPARASITISM. 13 words contain a doubled letter.

Full list 18

appropriatenessconsideratenessinvoluntarinesscommonplacenessdeterminatenessextemporarinesshydrodynamicistimportunatenessintemperatenessprecipitatenessfragmentarinesshypercatabolismhypermetabolismhyperparasitismprecipitantnessrudimentarinesssubordinatenesssuperparasitism

About this list

Words
18 (3 common words)
Common example
appropriateness
Rare example
superparasitism
Doubled letters
13
Ending in S
13

Questions

How many 15-letter words matching ________a____s_ are there?

18. 3 of them are common words.

What is a common example?

APPROPRIATENESS is among the common words in this set.