Swish is what you do with something in water, like to rinse it off. Or rinse your mouth out with water or mouthwash. Or the sound those things make.

Swipe is a small hand motion you might perform with an object like a credit card you swipe through a card reader. It can also mean to steal something, since that usually involves a quick hand movement. And of course a gesture on a touch device like a phone or tablet.

Swap is to exchange one item for another item. To trade. In the US we have things called “swap meets” which are like things called “flea markets” where you can trade things. Usually you are trading cash for some type of used item. You swap out old parts for new ones when performing maintenance on a car or machine or computer.

Sweep you do with a broom. Like you might sweep dust under a rug as a shortcut rather than using a dustpan to collect it and properly dispose of it into a garbage can. But it can also refer to a broad approach. For example a police sweep of the area. Or sweeping legislation for broad laws. Or sweeping changes within say an organization.

Swoop is what a bird does when it comes in to grab its prey, or to grab your sandwich. Or what your manager does when out of nowhere he shows up looking over your shoulder to “swoop in.” Or the shape of the path the bird takes when it performs this action could be a swooping motion. Superman might also do this when he flies in to rescue you.