comparation n.

mid-14c., "equal, match, resemblance, similarity," from Old French comparaison "comparison" (12c.), from Latin comparationem (nominative comparatio), noun of action from past participle stem of comparare "make equal with, liken, bring together for a contest," from com "with, together" (see com-) + par "equal" (see par (n.)).

From late 14c. as "act of putting two things together and regarding them as equal," also "act of comparing."