WordNet sense 1 (the state of inactivity following an interruption):

arrest, check, halt, hitch, stay, stoppage

WordNet sense 2 (a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations):

period, point, full point, full stop

WordNet sense 3 (a consonant produced by stopping the flow of air at some point and suddenly releasing it):

occlusive, plosive, stop consonant, plosive consonant, plosive speech sound

WordNet sense 4 (a mechanical device in a camera that controls size of aperture of the lens):

diaphragm

WordNet sense 5 (a restraint that checks the motion of something):

catch

WordNet sense 6 (an obstruction in a pipe or tube):

block, blockage, closure, occlusion

WordNet sense 7 (put an end to a state or an activity):

cease, discontinue, quit, give up, lay off

WordNet sense 8 (have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical):

end, finish, terminate

WordNet sense 9 (stop from happening or developing):

kibosh

WordNet sense 10 (interrupt a trip):

stop over

WordNet sense 11 (render unsuitable for passage):

bar, blockade, barricade, block off, block up

WordNet sense 12 (seize on its way):

intercept, intercept

WordNet sense 13 (hold back, as of a danger or an enemy; check the expansion or influence of):

contain, turn back, hold back

WordNet sense 14 (a brief stay in the course of a journey):

layover, stopover

WordNet sense 15 (stop and wait, as if awaiting further instructions or developments):

hold on

WordNet sense 16 (prevent completion):

break, break off