1: οὐά
(Strong's #3758 — interjective — oua — oo-ah' )

an interjection of derision and insult, is translated "Ha!" in Mark 15:29 , RV.

2: ἔα
(Strong's #1436 — Interjection — ea — eh'-ah )

an interjection of surprise, fear and anger, was the ejaculation of the man with the spirit of an unclean demon, Luke 4:34 , RV; the AV renders it "Let us alone" (see RV , marg.).