12-Letter Words Matching ________C__C

There are 13 12-letter words that match ________C__C. 2 are common words, such as CHIROPRACTIC and PROPHYLACTIC. A rarer one is THERMOTACTIC. In this set, I is the most frequent open letter (13 words). 1 words contain a doubled letter.

Full list 13

chiropracticprophylacticautodidacticheterocyclicsubantarcticamphibrachicanaphylacticinterpsychicintrapsychicmetagalacticphyllotacticstereotacticthermotactic

About this list

Words
13 (2 common words)
Common example
chiropractic
Rare example
thermotactic
Doubled letters
1
Ending in S
0
Most frequent letter
I (13)

Questions

How many 12-letter words matching ________c__c are there?

13. 2 of them are common words.

What is a common example?

CHIROPRACTIC is among the common words in this set.