urchin vs tyke

urchin and tyke both are nouns.

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

As nouns, tyke is a hypernym of urchin; that is, tyke is a word with a broader meaning than urchin:

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

urchin (noun)	tyke (noun)
poor and often mischievous city child	a young person of either sex
	a crude uncouth ill-bred person lacking culture or refinement