body type vs habitus

body type and habitus both are nouns.

Word	Noun	Adjective	Verb	Adverb
body type	Yes	No	No	No
habitus	Yes	No	No	No

As nouns, habitus is a hypernym of body type; that is, habitus is a word with a broader meaning than body type:

Other hypernyms of body type include body-build, build, physique.

body type (noun)	habitus (noun)
a category of physique	constitution of the human body
	person's predisposition to be affected by something (as a disease)