offspring vs young

offspring and young both are nouns.

Word	Noun	Adjective	Verb	Adverb
offspring	Yes	No	No	No
young	Yes	Yes	No	No

As nouns, offspring and young are synonyms defined as:

offspring (noun)	young (noun)
any immature animal	any immature animal
something that comes into existence as a result	young people collectively
the immediate descendants of a person

offspring (adjective)	young (adjective)
	(used of living things especially persons) in an early period of life or development or growth
	(of crops) harvested at an early stage of development; before complete maturity
	not tried or tested by experience
	being in its early stage
	suggestive of youth; vigorous and fresh