valetudinarian vs valetudinary

valetudinarian is a noun but valetudinary is not a noun.

Word	Noun	Adjective	Verb	Adverb
valetudinarian	Yes	Yes	No	No
valetudinary	No	Yes	No	No

As adjectives, valetudinarian and valetudinary are synonyms defined as:

valetudinarian and valetudinary: of or relating to or characteristic of a person who is a valetudinarian

valetudinarian (noun)	valetudinary (noun)
weak or sickly person especially one morbidly concerned with his or her health

valetudinarian (adjective)	valetudinary (adjective)
of or relating to or characteristic of a person who is a valetudinarian	of or relating to or characteristic of a person who is a valetudinarian