When in doubt I consult Oxford English Dictionary (Pocket edition)
baptism, Religious rite of immersing in or sprinkling with water in sigh of purification & (with Christians) admission to the Church, usually accompanied by name-giving; naming of ship &c. [French, Latin, Greek (bapto - dip)]
baptize, administer baptism to, christen; purify, elevate,
christen, Admit to a Christian Church by baptism, give name to or name so & so (esp. person at baptism, also ship, animal, person by way of nickname) [Latin Christianus CHRISTIAN]
chrism, Consecrated oil
