1: βαπτισμός
(Strong's #909 — Noun Masculine — baptismos — bap-tis-mos' )

denotes "the act of washing, ablution," with special reference to purification, Mark 7:4 (in some texts, ver. 8); Hebrews 6:2 , "baptisms;" Hebrews 9:10 , "washings. See BAPTISM.

2: λουτρόν
(Strong's #3067 — Noun Neuter — loutron — loo-tron' )

"a bath, a laver" (akin to louo, see above), is used metaphorically of the Word of God, as the instrument of spiritual cleansing, Ephesians 5:26; in Titus 3:5 , of "the washing of regeneration" (see REGENERATION). In the Sept., Song of Song of Solomon 4:2; 6:6 .