youth vs hobbledehoy

youth and hobbledehoy both are nouns.

Word	Noun	Adjective	Verb	Adverb
youth	Yes	No	No	No
hobbledehoy	Yes	No	No	No

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

Other hyponyms of youth include blade, pup, puppy, pupil, school-age child, schoolchild, slip.

youth (noun)	hobbledehoy (noun)
the freshness and vitality characteristic of a young person	an awkward bad-mannered adolescent boy
young people collectively
a young person (especially a young man or boy)
early maturity; the state of being young or immature or inexperienced
the time of life between childhood and maturity
an early period of development