on one's initiative (adverb) voluntarily: of one's own free will
Sinonime: differing,
disparate, dissimilar, distant, divergent, diverse, incommensurate, like night and day, mismatched, not uniform,
odd, poles apart, unalike, unequivalent, uneven, unlike,
unmatched, unsimilar,
variable, various,
varying,
weird*
Antonime: equal,
identical, matched, same, similar