14-Letter Words Matching _Y_____N______

There are 17 14-letter words that match _Y_____N______. 5 are common words, such as HYDROGENATIONS and HYDROPONICALLY. A rarer one is SYNCHRONEITIES. In this set, I is the most frequent open letter (17 words). 3 words contain a doubled letter.

Full list 17

hydrogenationshydroponicallyhypersensitivehyperventilatehypochondriacshydrodynamicalhydrogenolysishypersensitizehypersonicallynyctaginaceoussynchronicallyhyaluronidaseshyperconscioushyperfunctionshypomagnesemiasycophantishlysynchroneities

About this list

Words
17 (5 common words)
Common example
hydrogenations
Rare example
synchroneities
Doubled letters
3
Ending in S
8
Most frequent letter
I (17)

Questions

How many 14-letter words matching _y_____n______ are there?

17. 5 of them are common words.

What is a common example?

HYDROGENATIONS is among the common words in this set.