Antonyms of adj additional

1 sense of additional

Sense 1
extra, additional -- (further or added; "called for additional troops"; "need extra help"; "an extra pair of shoes")

INDIRECT (VIA additive) -> subtractive -- (constituting or involving subtraction; "a subtractive correction")

Similarity of adj additional

1 sense of additional

Sense 1
extra, additional -- (further or added; "called for additional troops"; "need extra help"; "an extra pair of shoes")
       => additive (vs. subtractive) -- (characterized or produced by addition; "an additive process")