dissimilar -- (not similar; "a group of very dissimilar people"; "a pump not dissimilar to those once found on every farm"; "their understanding of the world is not so dissimilar from our own"; "took different (or dissimilar) approaches to the problem")
unalike, dissimilar -- (not alike or similar; "as unalike as two people could be")
unlike, dissimilar, different -- (marked by dissimilarity; "for twins they are very unlike"; "people are profoundly different")
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