icc has 1 distinct synonym spread across 1 of its 1 sense. 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.
a former independent federal agency that supervised and set rates for carriers that transported goods and people between states; was terminated in 1995
“the ICC was established in 1887 as the first federal agency”
Synonyms, antonyms and the broader and narrower relations for icc come from Princeton University’s WordNet. Full sources and licences.