street arab vs guttersnipe

street arab and guttersnipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
street arab	Yes	No	No	No
guttersnipe	Yes	No	No	No

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

street arab: (sometimes offensive) a homeless boy who has been abandoned and roams the streets
guttersnipe: a child who spends most of his time in the streets especially in slum areas

Other hypernyms of street arab include street urchin.

street arab (noun)	guttersnipe (noun)
(sometimes offensive) a homeless boy who has been abandoned and roams the streets	a child who spends most of his time in the streets especially in slum areas