15-Letter Words Matching ________M_____Y

There are 21 15-letter words that match ________M_____Y. 4 are common words, such as AERODYNAMICALLY and GASTRONOMICALLY. A rarer one is SEMIDOCUMENTARY. In this set, A is the most frequent open letter (21 words). 17 words contain a doubled letter.

Full list 21

aerodynamicallygastronomicallynoninflammatoryuncomplimentaryalgorithmicallycataclysmicallyfideicommissarylogarithmicallymacrocosmicallymicrocosmicallyphotochemicallyunparliamentarycytoplasmicallyepiphenomenallyhemodynamicallyhistochemicallynoncontemporaryphonogramicallyphytochemicallyradiochemicallysemidocumentary

About this list

Words
21 (4 common words)
Common example
aerodynamically
Rare example
semidocumentary
Doubled letters
17
Ending in S
0
Most frequent letter
A (21)

Questions

How many 15-letter words matching ________m_____y are there?

21. 4 of them are common words.

What is a common example?

AERODYNAMICALLY is among the common words in this set.