feed has 11 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. Its one recorded opposite is starve.
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.
provide as food
“Feed the guests the nuts”
give food to
“Feed the starving children in India”
feed into; supply
“Her success feeds her vanity”
support or promote
“His admiration fed her vanity”
serve as food for; be the food for
“This dish feeds six”
food for domestic livestock
Synonyms, antonyms and the broader and narrower relations for feed come from Princeton University’s WordNet. Full sources and licences.