Synonyms of supplemental

2 Syllables
icer, gravier, tipper, fusser, brancher, added
3 Syllables
supporting, gingerbread, vicarial
4 Syllables
adscititious, substituted, substitute, auxiliary, substituting, tributory, subsidiary, complemental
5 Syllables
substitutive, derivative
6 Syllables
over-and-above