ectomorph vs someone

ectomorph and someone both are nouns.

Word	Noun	Adjective	Verb	Adverb
ectomorph	Yes	No	No	No
someone	Yes	No	No	No

As nouns, someone is a hypernym of ectomorph; that is, someone is a word with a broader meaning than ectomorph:

ectomorph: a person with a thin body
someone: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

Other hypernyms of ectomorph include individual, mortal, person, somebody, soul.

ectomorph (noun)	someone (noun)
a person with a thin body	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential