tending to change or alter; exhibiting variety or diversity; varying

variant shades of color.

not agreeing or conforming; differing, esp. from something of the same general kind.

not definitive, as a version of part of a text; different; alternative

a variant reading.

not universally accepted.

a person or thing that varies.

a different spelling, pronunciation, or form of the same word

Vehemency is a variant of vehemence.

adjective

agreeing , same , similar

noun

base , root

adjective

alternative , derived , differing , divergent , exceptional , modified , various , varying , disparate , dissimilar , diverse , unlike , alterable , fluid , inconstant , mutable , uncertain , unsettled , unstable , unsteady , variable

noun

alternative , branch , development , exception , irregularity , modification , result , spinoff , variation , version , variety