Synonyms look
These words all mean to turn your eyes in a particular direction.
look to turn your eyes in a particular direction: If you look carefully you can just see our house from here.
She looked at me and smiled.
watch to look at somebody/something for a time, paying attention to what happens: to watch television
Watch what I do, then you try.
see to watch a game, television programme, performance, etc.: In the evening we went to see a movie.
view (formal) to look at something, especially when you look carefully; to watch television, a film, etc.: People came from all over the world to view her work.
watch, see or view?
You can see/view a film/programme but you cannot: see/view television. View is more formal than see and is used especially in business contexts.
observe (formal) to watch somebody/something carefully, especially to learn more about them or it: The patients were observed over a period of several months.
Patterns
to look/watch for somebody/something
to watch/observe what/who/how…
to look/watch/view/observe (somebody/something) with amazement/surprise/disapproval, etc.
to watch/see/view a film/show/programme
to watch/see a match/game/fight
to look (at somebody/something)/watch (somebody/something)/observe somebody/something carefully/closely