15-Letter Words Matching ___HA__________

There are 18 15-letter words that match ___HA__________. 5 are common words, such as ALPHABETIZATION and HAPHAZARDNESSES. A rarer one is UNCHANGEABILITY. In this set, E is the most frequent open letter (17 words). 4 words contain a doubled letter.

Full list 18

alphabetizationhaphazardnessesmechanisticallymethamphetamineoffhandednessesarchaeopteryxescephalochordatedisharmoniouslyunchallengeablearchaebacteriumcephalothoracescephalothoraxesexchangeabilitymechanochemicalmechanoreceptorphthalocyaninestrihalomethanesunchangeability

About this list

Words
18 (5 common words)
Common example
alphabetization
Rare example
unchangeability
Doubled letters
4
Ending in S
7
Most frequent letter
E (17)

Questions

How many 15-letter words matching ___ha__________ are there?

18. 5 of them are common words.

What is a common example?

ALPHABETIZATION is among the common words in this set.