stoop has 7 distinct synonyms spread across 4 of its 8 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.
debase oneself morally, act in an undignified, unworthy, or dishonorable way
Synonyms, antonyms and the broader and narrower relations for stoop come from Princeton University’s WordNet. Full sources and licences.
“I won't stoop to reading other people's mail”
descend swiftly, as if on prey
“The eagle stooped on the mice in the field”
sag, bend, bend over or down
“the rocks stooped down over the hiking path”
carry oneself, often habitually, with head, shoulders, and upper back bent forward
“The old man was stooping but he could walk around without a cane”
an inclination of the top half of the body forward and downward