habitus vs somatotype

habitus and somatotype both are nouns.

Word	Noun	Adjective	Verb	Adverb
habitus	Yes	No	No	No
somatotype	Yes	No	No	No

As nouns, somatotype is a hyponym of habitus; that is, somatotype is a word with a more specific, narrower meaning than habitus:

Other hyponyms of habitus include lankiness, dumpiness, squattiness, body type.

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