Roget's Thesaurus: Entry 18 (Dissimilarity)

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#18. Dissimilarity. -- N. dissimilarity, dissimilaritude[obs]; unlikeness, diversity, disparity, dissemblance[obs]; divergence, variation.; difference &c. 15; novelty, originality; creativeness; oogamy[obs].

V. be unlike &c. adj.; vary &c. (differ) 15; bear no resemblance to, differ toto coelo[Lat].

render unlike &c. adj.; vary &c. (diversify) 140.

Adj. dissimilar, unlike, disparate; divergent; of a different kind &c. (class) 75 unmatched, unique; new, novel; unprecedented &c. 83; original.

nothing of the kind; no such thing, quite another thing; far from it, cast in a different mold, tertium quid[Lat], as like a dock as a daisy, "very like a whale " [Hamlet]; as different as chalk from cheese, as different as Macedon and Monmouth; lucus a non lucendo[Lat].

diversified &c. 16a.

Adv. otherwise.

Phr. diis aliter visum[Lat]; " no more like my father than I to Hercules" [Hamlet].