Synonyms for Adrift (same or very similar meaning)
WordNet sense 1 (aimlessly drifting):
aimless, rudderless, directionless, planless, undirectedWordNet sense 2 (not evidencing any purpose or goal):
purposelessWordNet sense 3 (borne on the water; floating):
afloatFrom the ODE community, based on WordNetadd/edit