Synonyms for Immerse (same or very similar meaning)
WordNet sense 1 (enclose or envelop completely, as if by swallowing):
bury, swallow, eat up, swallow upWordNet sense 2 (thrust or throw into):
plungeWordNet sense 3 (engross (oneself) fully):
absorb, engross, engulf, steep, soak upFrom the ODE community, based on WordNetadd/edit