guttersnipe vs urchin

guttersnipe and urchin both are nouns.

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

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

guttersnipe: a child who spends most of his time in the streets especially in slum areas
urchin: poor and often mischievous city child

guttersnipe (noun)	urchin (noun)
a child who spends most of his time in the streets especially in slum areas	poor and often mischievous city child