13-Letter Words Matching __________A_Y

There are 50 13-letter words that match __________A_Y. 17 are common words, such as COMPLEMENTARY and COMPLIMENTARY. A rarer one is THALASSOCRACY. In this set, R is the most frequent open letter (50 words). 6 words contain a doubled letter.

Full list 50

Common words

complementarycomplimentaryconcessionarydiscretionaryexpeditionaryextraordinarygenitourinarygeostationaryindeterminacynonhereditaryparliamentaryphysiotherapy
complementarycomplimentaryconcessionarydiscretionaryexpeditionaryextraordinarygenitourinarygeostationaryindeterminacynonhereditaryparliamentaryphysiotherapyprecautionarypsychotherapyrevolutionarysupernumerarysupplementaryactinotherapyanthropophagybibliotherapybrachycephalyconcretionaryconfectionarydevolutionaryillocutionaryimmunotherapyintegumentaryinvolutionaryorganotherapyprimogenitarypyretotherapyquincentenarysubventionarythermotherapytransitionarybacteriophagychronotherapyconclusionaryconvulsionarydeuteranomalydigressionaryextraliteraryhypopituitarynonelementarynonstationarypostsecondarysemilegendarysemisedentarysubversionarythalassocracy

About this list

Words
50 (17 common words)
Common example
complementary
Rare example
thalassocracy
Doubled letters
6
Ending in S
0
Most frequent letter
R (50)

Questions

How many 13-letter words matching __________a_y are there?

50. 17 of them are common words.

What is a common example?

COMPLEMENTARY is among the common words in this set.