habitual vs habit

habitual is not a noun while habit is a noun.

Word	Noun	Adjective	Verb	Adverb
habitual	No	Yes	No	No
habit	Yes	No	Yes	No

habitual (noun)	habit (noun)
	excessive use of drugs
	(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition
	a distinctive attire worn by a member of a religious order
	attire that is typically worn by a horseback rider (especially a woman's attire)
	an established custom
	the general form or mode of growth (especially of a plant or crystal)

habitual (adjective)	habit (adjective)
commonly used or practiced; usual

habitual (verb)	habit (verb)
	put a habit on