dose has 22 distinct synonyms spread across 5 of its 6 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.
the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
a communicable infection transmitted by sexual intercourse or genital contact
treat with an agent; add (an agent) to
“The ray dosed the paint”
Synonyms, antonyms and the broader and narrower relations for dose come from Princeton University’s WordNet. Full sources and licences.