Nouns

(n)remainder, balance, residual, residue, residuum, restsomething left after other parts have been taken away“there was no remainder”, “he threw away the rest”, “he took what he wanted and I got the balance”
(n)residual(often plural) a payment that is made to a performer or writer or director of a television show or commercial that is paid for every repeat showing“he could retire on his residuals”

Adjectives

(a)residual, residuaryrelating to or indicating a remainder“residual quantity”