14-Letter Words Matching ____Q_________

There are 18 14-letter words that match ____Q_________. 8 are common words, such as ANTIQUARIANISM and DISEQUILIBRIUM. A rarer one is TRANQUILNESSES. 7 words contain a doubled letter.

Full list 18

antiquarianismdisequilibriumheadquarteringnonequivalentsobsequiousnesstranquillitiestranquillizerstranquillizingquinquenniallyquinquepartitereacquaintanceunrequitednessdeliquescencesdisequilibratenonequilibriumnonequivalencereacquisitionstranquilnesses

About this list

Words
18 (8 common words)
Common example
antiquarianism
Rare example
tranquilnesses
Doubled letters
7
Ending in S
8

Questions

How many 14-letter words matching ____q_________ are there?

18. 8 of them are common words.

What is a common example?

ANTIQUARIANISM is among the common words in this set.