1: εἰκών
(Strong's #1504 — Noun Feminine — eikon — i-kone' )

denotes "an image;" the word involves the two ideas of representation and manifestation. "The idea of perfection does not lie in the word itself, but must be sought from the context" (Lightfoot); the following instances clearly show any distinction between the imperfect and the perfect likeness.

Matthew 22:20Mark 12:16Luke 20:24Romans 1:23Revelation 13:14,15 1—Corinthians 15:49Hebrews 10:11—Corinthians 11:7Colossians 3:10Ephesians 4:24Romans 8:291—Corinthians 15:492—Corinthians 4:4Colossians 1:15John 14:9FORM.
2: χαρακτήρ
(Strong's #5481 — Noun Masculine — charakter — khar-ak-tar' )

denotes, firstly, "a tool for graving" (from charasso, "to cut into, to engross;" cp. Eng., "character," "characteristic"); then, "a stamp" or "impress," as on a coin or a seal, in which case the seal or die which makes an impression bears the "image" produced by it, and, vice versa, all the features of the "image" correspond respectively with those of the instrument producing it. In the NT it is used metaphorically in Hebrews 1:3 , of the Son of God as "the very image (marg., 'the impress') of His substance." RV. The phrase expresses the fact that the Son "is both personally distinct from, and yet literally equal to, Him of whose essence He is the adequate imprint" (Liddon). The Son of God is not merely his "image" (His charakter), He is the "image" or impress of His substance, or essence. It is the fact of complete similarity which this word stresses in comparison with those mentioned at the end of No. 1. In the Sept., Leviticus 13:28 , "the mark (of the inflammation)."

John 1:1-3Colossians 1:15-17Hebrews 1:2,3Revelation 13:16,17Acts 17:29