11-Letter Words Matching ____YN_____

There are 12 11-letter words that match ____YN_____. 3 are common words, such as GEOSYNCLINE and HOMEYNESSES. A rarer one is PRESYNAPTIC. In this set, S is the most frequent open letter (11 words). 5 words contain a doubled letter.

Full list 12

geosynclinehomeynessespharyngitisapocynthionbiodynamicsgeodynamicscageynessesgooeynesseshokeynessesmateynessespredynasticpresynaptic

About this list

Words
12 (3 common words)
Common example
geosyncline
Rare example
presynaptic
Doubled letters
5
Ending in S
8
Most frequent letter
S (11)

Questions

How many 11-letter words matching ____yn_____ are there?

12. 3 of them are common words.

What is a common example?

GEOSYNCLINE is among the common words in this set.