S: (n) form, variant, strain, var. ((biology) a group of organisms within a species that differ in trivial ways from similar groups) "a new strain of microorganisms"
S: (v) change, alter, vary (become different in some particular way, without permanently losing one's or its former characteristics or essence) "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season"
S: (n) version, variant, variation, edition (something a little different from others of the same type) "an experimental version of the night fighter"; "a variant of the same word"; "an emery wheel is the modern variation of a grindstone"; "the boy is a younger edition of his father"
Adjective
S: (adj) variant (differing from a norm or standard) "a variant spelling"
S: (adj) variant (exhibiting variation and change) "letters variant in size"