weakling vs softie

weakling and softie both are nouns.

Word	Noun	Adjective	Verb	Adverb
weakling	Yes	No	No	No
softie	Yes	No	No	No

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

Other hyponyms of weakling include namby-pamby, softy, chicken, crybaby, wimp.

weakling (noun)	softie (noun)
a person who is physically weak and ineffectual	a person who is weak and excessively sentimental