[f. COMPASSIONATE v. + -OR, -ER: see -ER1 2.] One who compassionates.
1684. Charnock, Attrib. God (1834), I. 714. Shall thy creature only passively glorify thee as an avenger, and not actively as a compassionater?
1836. New Monthly Mag., XLVIII. 357. Let those self-compassionators keep house in America for but one month.