pullet vs chicken

pullet and chicken both are nouns.

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

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

Other hypernyms of pullet include poulet, volaille.

pullet (noun)	chicken (noun)
young hen usually less than a year old	a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl
flesh of a medium-sized young chicken suitable for frying	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

pullet (adjective)	chicken (adjective)
	easily frightened