habit vs nun's habit

habit and nun's habit both are nouns.

Word	Noun	Adjective	Verb	Adverb
habit	Yes	No	Yes	No
nun's habit	Yes	No	No	No

As nouns, nun's habit is a hyponym of habit; that is, nun's habit is a word with a more specific, narrower meaning than habit:

Other hyponyms of habit include frock, monastic habit.

habit (noun)	nun's habit (noun)
excessive use of drugs	a long loose habit worn by nuns in a convent
(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)

habit (verb)	nun's habit (verb)
put a habit on