Some words ending with -ary are adjectives and others are nouns, but -ary isn't any part of speech. It's a suffix. The word suffix is a noun.
ryming words
granary
{Bin} {Ary}
This is a lot of them : sanctuarydictionary estuaryFebruarygranaryimaginaryjanuarylibarymissionarynecessaryprimary
fiduciaryfragmentaryfunctionary
Mission and ary
* dictionary * canary * scary * vary
libray dictionary voluntry P.S I'm a fishomung
Ary Coslov's birth name is Coslovsky, Ary.
Ary Barroso's birth name is Ary Evangelista Barroso.
Ary Fontoura's birth name is Ary Beira Fontoura.
Legend + ary = legendary.noun + ary = adjective.Vision + ary = visionary/ (a) visionarynoun + ary = adjective/ noun.Mission + ary = missionary/ (a) missionary.noun + ary = adjective / noun.so as it seems, it definitely turns the base word (noun) into an adjective. It may also keep it a noun at other times.