flip has 27 distinct synonyms spread across 14 of its 18 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
cause to go on or to be engaged or set in operation
“switch on the light”
reverse (a direction, attitude, or course of action)
an acrobatic feat in which the feet roll over the head (either forward or backward) and return
hot or cold alcoholic mixed drink containing a beaten egg
a sudden, quick movement
“with a flip of the wrist”
a dive in which the diver somersaults before entering the water
Synonyms, antonyms and the broader and narrower relations for flip come from Princeton University’s WordNet. Full sources and licences.