WordNet sense 1 (spots before the eyes caused by opaque cell fragments in the vitreous humor and lens):

spots, musca volitans, muscae volitantes

WordNet sense 2 (a wanderer who has no established residence or visible means of support):

drifter, vagabond, vagrant

WordNet sense 3 (an insurance policy covering loss of movable property (e.g. jewelry) regardless of its location):

floating policy