chicken vs weakling

chicken and weakling both are nouns.

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

As nouns, weakling is a hypernym of chicken; that is, weakling is a word with a broader meaning than chicken:

Other hypernyms of chicken include doormat, wuss.

chicken (noun)	weakling (noun)
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl	a person who is physically weak and ineffectual
a foolhardy competition; a dangerous activity that is continued until one competitor becomes afraid and stops
the flesh of a chicken used for food
a person who lacks confidence, is irresolute and wishy-washy

chicken (adjective)	weakling (adjective)
easily frightened