glare has 6 distinct synonyms spread across 4 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.
a light within the field of vision that is brighter than the brightness to which the eyes are adapted
“a glare of sunlight”
a focus of public attention
“he enjoyed being in the limelight”
be sharply reflected
“The moon glared back at itself from the lake's surface”
Synonyms, antonyms and the broader and narrower relations for glare come from Princeton University’s WordNet. Full sources and licences.