15-Letter Words Matching _____CH________

There are 18 15-letter words that match _____CH________. 5 are common words, such as BIOTECHNOLOGIES and DISENCHANTMENTS. A rarer one is RADIOCHEMICALLY. 7 words contain a doubled letter.

Full list 18

biotechnologiesdisenchantmentsinterchangeableinterchangeablynonexchangeablebiotechnologistdisenchantinglymelancholicallynitrochloroformoverachievementphotochemicallyresynchronizingbiomechanicallydisaccharidaseshistochemicallynonarchitecturephytochemicallyradiochemically

About this list

Words
18 (5 common words)
Common example
biotechnologies
Rare example
radiochemically
Doubled letters
7
Ending in S
3

Questions

How many 15-letter words matching _____ch________ are there?

18. 5 of them are common words.

What is a common example?

BIOTECHNOLOGIES is among the common words in this set.