march has 18 distinct synonyms spread across 9 of its 14 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 act of marching; walking with regular steps (especially in a procession of some kind)
“it was a long march”
a steady advance
“the march of science”
a procession of people walking together
“the march went up Fifth Avenue”
district consisting of the area on either side of a border or boundary of a country or an area
“the Welsh marches between England and Wales”
genre of music written for marching
“Sousa wrote the best marches”
a degree granted for the successful completion of advanced study of architecture
Synonyms, antonyms and the broader and narrower relations for march come from Princeton University’s WordNet. Full sources and licences.
march in protest; take part in a demonstration
“Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle”
cause to march or go at a marching pace
“They marched the mules into the desert”