doormat vs somebody

doormat and somebody both are nouns.

Word	Noun	Adjective	Verb	Adverb
doormat	Yes	No	No	No
somebody	Yes	No	No	No

As nouns, somebody is a hypernym of doormat; that is, somebody is a word with a broader meaning than doormat:

doormat: a person who is physically weak and ineffectual
somebody: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

Other hypernyms of doormat include individual, mortal, person, someone, soul.

doormat (noun)	somebody (noun)
a mat placed outside an exterior door for wiping the shoes before entering	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential
a person who is physically weak and ineffectual