Christianize rhymes with:
africanize, agonize, aluminize, americanize, antagonize, balkanize, canonize, carbonize, colonize, communize, demonize, disorganize, euthanize, galvanize, harmonize, hellenize, homogenize, humanize, ionize, lionize, mechanize, organize, patronize, reorganize, revolutionize, scrutinize, suburbanize, synchronize, unionize, urbanize, womanize
Christianize sounds like:
carstens, cherrystones, christening, christians, christine's, christman's, christmas, christmas', christmases, correcting, corrections, correctness, crackdowns, cresting, cristiani's, crocheting, crookedness, crusading