variation
vari.a.tion \.ver-e--'a--sh*n, .var-\ n 1a: the act or process of varying : the state or fact of being varied 1b: an instance of varying 1c: the extent to which or range in which a thing varies 2: Declination which a thing varies DECLINATION 3: a change in the mean motion or mean orbit of a celestial body 4a: a change of algebraic sign between successive terms of a sequence 4b: a measure of the change in a variable or function 5: the repetition of a musical theme with modifications in rhythm, tune, ha rmony, or key 6a: divergence in qualities of an organism or biotype from those typical or usual to its group 6b: an individual or group exhibiting variation 7a: a solo dance in classic ballet 7b: a repetition in modern ballet of a movement sequence with changes
Webster's English Dictionary