spring chicken vs pup

spring chicken and pup both are nouns.

Word	Noun	Adjective	Verb	Adverb
spring chicken	Yes	No	No	No
pup	Yes	No	Yes	No

As nouns, pup is a hyponym of spring chicken; that is, pup is a word with a more specific, narrower meaning than spring chicken:

Other hyponyms of spring chicken include blade, hobbledehoy, puppy, pupil, school-age child, schoolchild, slip.

spring chicken (noun)	pup (noun)
a young chicken having tender meat	young of any of various canines such as a dog or wolf
a young person (especially a young man or boy)	an inexperienced young person

spring chicken (verb)	pup (verb)
	give birth to (a puppy)