youngster vs tyke

youngster and tyke both are nouns.

Word	Noun	Adjective	Verb	Adverb
youngster	Yes	No	No	No
tyke	Yes	No	No	No

As nouns, youngster and tyke are synonyms defined as:

Other synonyms of youngster include child, fry, kid, minor, nestling, nipper, shaver, small fry, tiddler, tike.

youngster (noun)	tyke (noun)
a young person of either sex	a young person of either sex
	a crude uncouth ill-bred person lacking culture or refinement