Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

13. Identity — N. identity, sameness; coincidence, coalescence;

convertibility; equality &c 27; selfness†, self, oneself; identification. monotony, tautology &c (repetition) 104. facsimile &c (copy) 21; homoousia: alter ego &c (similar) 17; 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†. coincide, coalescent, coalescing; indistinguishable; one; equivalent &c (equal) 27; tweedle dee and tweedle dum [Lat.]; much the same, of a muchness†; unaltered. Adv. identically &c adj.; on all fours.