waif vs street child

waif and street child both are nouns.

Word	Noun	Adjective	Verb	Adverb
waif	Yes	No	No	No
street child	Yes	No	No	No

As nouns, waif and street child are synonyms defined as:

waif and street child: a homeless child especially one forsaken or orphaned

waif (noun)	street child (noun)
a homeless child especially one forsaken or orphaned	a homeless child especially one forsaken or orphaned