doormat vs namby-pamby

doormat and namby-pamby both are nouns.

Word	Noun	Adjective	Verb	Adverb
doormat	Yes	No	No	No
namby-pamby	Yes	Yes	No	No

As nouns, namby-pamby is a hyponym of doormat; that is, namby-pamby is a word with a more specific, narrower meaning than doormat:

Other hyponyms of doormat include softie, softy, chicken, crybaby, wimp.

doormat (noun)	namby-pamby (noun)
a mat placed outside an exterior door for wiping the shoes before entering	an insipid weakling who is foolishly sentimental
a person who is physically weak and ineffectual

doormat (adjective)	namby-pamby (adjective)
	lacking courage or vitality