stump has 10 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.
the base part of a tree that remains standing after the tree has been felled
the part of a limb or tooth that remains after the rest is removed
(cricket) any of three upright wooden posts that form the wicket
Synonyms, antonyms and the broader and narrower relations for stump come from Princeton University’s WordNet. Full sources and licences.
travel through a district and make political speeches
“the candidate stumped the Northeast”
remove tree stumps from
“stump a field”