full has 13 distinct synonyms spread across 9 of its 13 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. Its 2 recorded opposites are empty, thin.
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 time when the Moon is fully illuminated
“the moon is at the full”
to the greatest degree or extent; completely or entirely; (`full' in this sense is used as a combining form)
“fully grown”
Synonyms, antonyms and the broader and narrower relations for full come from Princeton University’s WordNet. Full sources and licences.