Scary
The suffix -ary is used to form nouns and adjectives.Example Nouns:canarydictionarymissionaryquandaryExample Adjectives:culinarynecessaryprimarysedentary
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.
granary
-ary is the suffix.
This is a lot of them : sanctuarydictionary estuaryFebruarygranaryimaginaryjanuarylibarymissionarynecessaryprimary
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.
Not in any dictionary I tried (two of which contain over 250,000 words each).
FEB-RU-ARY
-ary
a$$hole
{Bin} {Ary}
One example of an English word with the suffix "ary" is "legendary," which means something remarkable or noteworthy.