tyke vs youngster

tyke and youngster both are nouns.

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

As nouns, tyke and youngster are synonyms defined as:

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

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