hobbledehoy vs spring chicken

hobbledehoy and spring chicken both are nouns.

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

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

Other hypernyms of hobbledehoy include young person, younker, youth.

hobbledehoy (noun)	spring chicken (noun)
an awkward bad-mannered adolescent boy	a young chicken having tender meat
	a young person (especially a young man or boy)