Nouns

(n)watch, tickera small portable timepiece
(n)watcha period of time (4 or 2 hours) during which some of a ship's crew are on duty
(n)watch, vigila purposeful surveillance to guard or observe
(n)watchthe period during which someone (especially a guard) is on duty
(n)lookout, sentinel, sentry, watch, spotter, scout, picketa person employed to keep watch for some anticipated event
(n)vigil, watchthe rite of staying awake for devotional purposes (especially on the eve of a religious festival)

Verbs

(v)watchlook attentively“watch a basketball game”
(v)watch, observe, follow, watch over, keep an eye onfollow with the eyes or the mind“Keep an eye on the baby, please!”, “The world is watching Sarajevo”, “She followed the men with the binoculars”
(v)watch, view, see, catch, take insee or watch“view a show on television”, “This program will be seen all over the world”, “view an exhibition”, “Catch a show on Broadway”, “see a movie”
(v)watch, look onobserve without intervening“They watched as the murderer was executed”
(v)watch, look out, watch outbe vigilant, be on the lookout or be careful“Watch out for pickpockets!”
(v)watchobserve or determine by looking“Watch how the dog chases the cats away”
(v)determine, check, find out, see, ascertain, watch, learnfind out, learn, or determine with certainty, usually by making an inquiry or other effort“I want to see whether she speaks French”, “See whether it works”, “find out if he speaks Russian”, “Check whether the train leaves on time”