15-Letter Words Matching ____O_Y________

There are 14 15-letter words that match ____O_Y________. 3 are common words, such as PHOTOSYNTHESIZE and PHOTOTYPESETTER. A rarer one is NEUROHYPOPHYSIS. 1 words contain a doubled letter.

Full list 14

photosynthesizephototypesetterpoliomyelitideshydrodynamicistosteomyelitidesphototypographyadenohypophysesadenohypophysishydroxyapatiteshydroxylapatitehydroxyprolinesmethoxyfluranesneurohypophysesneurohypophysis

About this list

Words
14 (3 common words)
Common example
photosynthesize
Rare example
neurohypophysis
Doubled letters
1
Ending in S
9

Questions

How many 15-letter words matching ____o_y________ are there?

14. 3 of them are common words.

What is a common example?

PHOTOSYNTHESIZE is among the common words in this set.