additive

Synonyms

accumulative, cumulative

increasing by successive addition

addable, addible

capable of being added or added to

additional, extra

further or added

complemental, complementary, completing

acting as or providing a complement (something that completes the whole)

incremental

increasing gradually by regular degrees or additions

intercalary

having a day or month inserted to make the calendar year correspond to the solar year: "Feb. 29 is an intercalary day"

summational, summative

of or relating to a summation or produced by summation

supplemental, supplementary

added to complete or make up a deficiency

Antonyms:

subtractive

constituting or involving subtraction

ablative

tending to ablate; i.e. to be removed or vaporized at very high temperature

reductive

characterized by or causing diminution or curtailment

show more antonyms...

Synonyms:

linear

bilinear

linear with respect to each of two variables or positions

Antonyms:

nonlinear

designating or involving an equation whose terms are not of the first degree