clog has 14 distinct synonyms spread across 6 of its 9 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 unclog.
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.
impede the motion of, as with a chain or a burden
“horses were clogged until they were tamed”
impede with a clog or as if with a clog
“The market is being clogged by these operations”
any object that acts as a hindrance or obstruction
Synonyms, antonyms and the broader and narrower relations for clog come from Princeton University’s WordNet. Full sources and licences.
a dance performed while wearing shoes with wooden soles; has heavy stamping steps