1: πλάνη
(Strong's #4106 — Noun Feminine — plane — plan'-ay )

akin to planao (see ERR , No. 1), "a wandering, a forsaking of the right path, see James 5:20 , whether in doctrine, 2—Peter 3:17; 1—John 4:6 , or in morals, Romans 1:27; 2—Peter 2:18; Jude 1:11 , though, in Scripture, doctrine and morals are never divided by any sharp line. See also Matthew 27:64 , where it is equivalent to 'fraud.'" * [* From Notes on Thessalonians by Hogg and Vine, p. 53.]

Ephesians 4:14 1—Thessalonians 2:32—Thessalonians 2:11DECEIT. Jude 1:13
2: ἀγνόημα
(Strong's #51 — Noun Neuter — agnoema — ag-no'-ay-mah )

"a sin of ignorance" (cp. agnoia, "ignorance," and agnoeo, "to be ignorant"), is used in the plural in Hebrews 9:7 .