A — 1: ὑποκρίνομαι
(Strong's #5271 — Verb — hupokrinomai — hoop-ok-rin'-om-ahee )

primarily denotes "to answer;" then, "to answer on the stage, play a part," and so, metaphorically, "to feign, pretend," Luke 20:20 . Cp. hupokrites, "a hypocrite," and hupokrisis, "hypocrisy."

B — 1: πλαστός
(Strong's #4112 — Adjective — plastos — plas-tos' )

primarily denotes "formed, molded" (from plasso, to mold; Eng., "plastic"); then, metaphorically, "made up, fabricated, feigned," 2—Peter 2:3 . Cp. plasma, "that which is molded," Romans 9:20 .