glow has 12 distinct synonyms spread across 8 of its 12 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 phenomenon of light emission by a body as its temperature is raised
a feeling of considerable warmth
“the glow of new love”
have a complexion with a strong bright color, such as red or pink
“Her face glowed when she came out of the sauna”
Synonyms, antonyms and the broader and narrower relations for glow come from Princeton University’s WordNet. Full sources and licences.
be exuberant or high-spirited
“Make the people's hearts glow”