12-Letter Words Matching _______A_S__

There are 21 12-letter words that match _______A_S__. 4 are common words, such as ANTIMACASSAR and FIBERGLASSES. A rarer one is PREREHEARSAL. In this set, S is the most frequent open letter (19 words). 17 words contain a doubled letter.

Full list 21

antimacassarfiberglassesplexiglassesunderclassescontrabassescontredansesgroundmassesparasynapsissuperclassessupergrasseswitchgrassesbromegrassesbunchgrassesfiberglassedfibreglassesgoosegrasseshollandaiseslemongrassesmisappraisalnucleocapsidprerehearsal

About this list

Words
21 (4 common words)
Common example
antimacassar
Rare example
prerehearsal
Doubled letters
17
Ending in S
16
Most frequent letter
S (19)

Questions

How many 12-letter words matching _______a_s__ are there?

21. 4 of them are common words.

What is a common example?

ANTIMACASSAR is among the common words in this set.