Synonyms of additional

1 Syllable

plus, perk, more, new

2 Syllables

plusses, icer, option, gravier, further, padding, adnoun, tipper, sparer, elser, sparest, second, placer, fusser, added, other, spare

3 Syllables

unneeded, affixed, appended, qualifiers, extraneous, gingerbread, qualifier, unpaired, increased, vicarial, runner-up, seconding

4 Syllables

adscititious, adjective, unrequired, inessential, substituted, identifiers, ancillary, incremental, substitute, subsidary, substituting, identifier

5 Syllables

unnecessary, attributive, substitutive, supplementary

6 Syllables

supernumerary, over-and-above, accumulative