13-Letter Words Matching _H_________A_

There are 18 13-letter words that match _H_________A_. 6 are common words, such as CHRONOLOGICAL and PHARMACOPEIAS. A rarer one is THALASSAEMIAS. 1 words contain a doubled letter.

Full list 18

chronologicalpharmacopeiasphenobarbitalphilosophicalphysiologicalthermonuclearphalansterianphotochemicalphotometricalphrenologicalphytochemicaltherapeuticalchemosurgicalchlorenchymascholangiogrampharmacopeialphosphaturiasthalassaemias

About this list

Words
18 (6 common words)
Common example
chronological
Rare example
thalassaemias
Doubled letters
1
Ending in S
4

Questions

How many 13-letter words matching _h_________a_ are there?

18. 6 of them are common words.

What is a common example?

CHRONOLOGICAL is among the common words in this set.