In figuratively|lang=en terms the difference between child and prostitute
is that
child is (figuratively) a thing or abstraction derived from or caused by something while
prostitute is (figuratively) to exploit for base purposes; to whore.
As nouns the difference between child and prostitute
is that
child is a daughter or son; an offspring while
prostitute is a person who performs sexual activity for payment, especially a woman.
As a verb prostitute is
(usually reflexively) to perform sexual activity for money.