A — 1: ἁγνός
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(Strong's #53 — Adjective — hagnos — hag-nos' )

"pure from defilement, not contaminated" (from the same root as hagios, "holy"), is rendered "pure" in Philippians 4:8; 1—Timothy 5:22; James 3:17; 1—John 3:3; see CHASTE.

A — 2: καθαρός
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(Strong's #2513 — Adjective — katharos — kath-ar-os' )

"pure," as being cleansed, e.g., Matthew 5:8; 1—Timothy 1:5; 3:9; 2—Timothy 1:3; 2:22; Titus 1:15; Hebrews 10:22; James 1:27; 1—Peter 1:22; Revelation 15:6; 21:18; 22:1 (in some mss.). See CHASTE , Note, CLEAN , A.

1—Peter 1:22
A — 3: εἰλικρινής
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(Strong's #1506 — Adjective — elikrines — i-lik-ree-nace' )

signifies "unalloyed, pure;" (a) it was used of unmixed substances; (b) in the NT it is used of moral and ethical "purity," Philippians 1:10 , "sincere;" so the RV in 2—Peter 3:1 (AV, "pure"). Some regard the etymological meaning as "tested by the sunlight" (Cremer). See CHASTE , Note, SINCERE.

B — 1: ἁγνότης
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(Strong's #54 — Noun Feminine — hagnotes — hag-not'-ace )

the state of being hagnos (A, No. 1), occurs in 2—Corinthians 6:6 , "pureness;" 2—Corinthians 11:3 , in the best mss., "(and the) purity," RV.

B — 2: ἁγνεία
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(Strong's #47 — Noun Feminine — hagneia — hag-ni'-ah )

synonymous with No. 1, "purity," occurs in 1—Timothy 4:12; 5:2 , where it denotes the chastity which excludes all impurity of spirit, manner, or act.