#13.  Identity. —­ N. identity, sameness; coincidence, coalescence;
convertibility; equality &c. 27; selfness[obs3], self, oneself; identification.
     monotony, tautology &c. (repetition) 104.
     facsimile &c. (copy) 21; homoousia; alter ego &c. (similar) 17[obs3];
ipsissima verba &c. (exactness) 494[Lat]; same; self, very, one and the same; very thing, actual thing; real McCoy; no other; one and only; in the flesh. 
     V. be identical &c. adj.; coincide, coalesce, merge.
     treat as the same, render the same, identical; identify; recognize
the identity of. 
     Adj. identical; self, ilk; the same &c. n. selfsame, one and the same,
homoousian[obs3].
     coincide, coalescent, coalescing; indistinguishable; one; equivalent
&c. (equal) 27; tweedle dee and tweedle dum[Lat]; much the same, of a muchness[obs3]; unaltered.  Adv. identically &c. adj.; on all fours.

     #14. [Noncoincidence.] Contrariety.—­ N. contrariety, contrast, foil,
antithesis, oppositeness; contradiction; antagonism &c. (opposition) 708; clashing, repugnance.
     inversion &c. 218; the opposite, the reverse, the inverse, the
converse, the antipodes, the antithesis, the other extreme.  V. be contrary &c. adj.; contrast with, oppose; diller toto coelo[Lat].
     invert, reverse, turn the tables; turn topsy-turvy, turn end for end,
turn upside down, turn inside out.
     contradict, contravene; antagonize &c. 708. 
     Adj. contrary, contrarious[obs3], contrariant[obs3]; opposite,
counter, dead against; converse, reverse; opposed, antithetical, contrasted, antipodean, antagonistic, opposing; conflicting, inconsistent, contradictory, at cross purposes; negative; hostile &c. 703. differing toto coelo[Lat]; diametrically opposite; diametrically opposed; as opposite as black and white, as opposite as light and darkness, as opposite as fire and water, as opposite as the poles; as different as night and day; “Hyperion to a satyr"[ Hamlet]; quite the contrary, quite the reverse; no such thing, just the other way, tout au contraire[Fr].  Adv. contrarily &c. adj.; contra, contrariwise, per contra, on the contrary, nay rather; vice versa; on the other hand &c. (in compensation) 30. 
     Phr. “all concord’s born of contraries” [B.  Jonson].  Thesis,
antithesis, synthesis [Marx].

     #15.  Difference. —­ N. difference; variance, variation, variety;
diversity, dissimilarity &c. 18; disagreement &c. 24; disparity &c. (inequality) 28; distinction, contradistinction; alteration. modification, permutation, moods and tenses.
     nice distinction, fine distinction, delicate distinction, subtle
distinction; shade of difference, nuance; discrimination &c. 465; differentia.
     different thing, something else, apple off another tree, another pair
of shoes; horse of a different color; this that or the other. 
     V. be different &c. adj.; differ, vary, ablude|, mismatch, contrast;