street arab vs gamin

street arab and gamin both are nouns.

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

As nouns, street arab and gamin are synonyms defined as:

street arab and gamin: (sometimes offensive) a homeless boy who has been abandoned and roams the streets

Other synonyms of street arab include throwaway.

street arab (noun)	gamin (noun)
(sometimes offensive) a homeless boy who has been abandoned and roams the streets	(sometimes offensive) a homeless boy who has been abandoned and roams the streets