stop has 45 distinct synonyms spread across 19 of its 22 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 start.
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 stopping something
“the third baseman made some remarkable stops”
a spot where something halts or pauses
“his next stop is Atlanta”
a consonant produced by stopping the flow of air at some point and suddenly releasing it
“his stop consonants are too aspirated”
a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
“in England they call a period a stop”
(music) a knob on an organ that is pulled to change the sound quality from the organ pipes
“the organist pulled out all the stops”
a mechanical device in a camera that controls size of aperture of the lens
“the new cameras adjust the diaphragm automatically”
an obstruction in a pipe or tube
“we had to call a plumber to clear out the blockage in the drainpipe”
Synonyms, antonyms and the broader and narrower relations for stop come from Princeton University’s WordNet. Full sources and licences.
put an end to a state or an activity
“Quit teasing your little brother”