WordNet sense 1 (continually changing especially as from one abode or occupation to another):

aimless, vagabond, vagrant, drifting

WordNet sense 2 (not settled or established):

unsettled

WordNet sense 3 (moving or capable of moving readily (especially from place to place)):

mobile, mobile

WordNet sense 4 (not firmly placed or set or fastened):

unfixed

WordNet sense 5 (the act of someone who floats on the water):

natation

WordNet sense 6 (borne on the water; floating):

afloat