Supplication

is always translated "supplication," or the plural, in the RV. See PRAYER, B, No. 3.

is the feminine form of the adjective hiketerios, denoting "of a suppliant," and used as a noun, formerly "an olive branch" carried by a suppliant (hiketes), then later, "a supplication," used with No. 1 in Heb 5:7. In the Sept., Job 40:22 (Eng. Vers. Job 41:3).