A — 1: ἐφίστημι
(Strong's #2186 — Verb — ephistemi — ef-is'-tay-mee )

lit., "to stand over" (epi, "over," histemi, "to stand"), signifies "to assault;" said in Acts 17:5 , of those who attacked the house of Jason. For its usual meanings see COME (in, to, upon), HAND (at), INSTANT , PRESENT , STAND.

B — 1: ὁρμή
(Strong's #3730 — Noun Feminine — horme — hor-may' )

rendered "assault" in Acts 14:5 , AV; RV, "onset," corresponds to hormao, "to rush." See IMPULSE , ONSET.