valetudinary vs valetudinarian

valetudinary is not a noun while valetudinarian is a noun.

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

As adjectives, valetudinary and valetudinarian are synonyms defined as:

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

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

valetudinary (adjective)	valetudinarian (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