Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun requisite

1 sense of requisite

Sense 1
necessity, essential, requirement, requisite, necessary -- (anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained")
       => thing -- (a separate and self-contained entity)

Antonyms of adj requisite

1 sense of requisite

Sense 1
needed, needful, required, requisite -- (necessary for relief or supply; "provided them with all things needful")

INDIRECT (VIA necessary) -> unnecessary, unneeded -- (not necessary)

Similarity of adj requisite

1 sense of requisite

Sense 1
needed, needful, required, requisite -- (necessary for relief or supply; "provided them with all things needful")
       => necessary (vs. unnecessary) -- (absolutely essential)