Synonyms for Swim:

n.

contract, suffer, invade, have, afflict, develop, go down with, get, come down with, catch. belly flop, the butterfly, bathing, cannonball, backstroke, crawl, decompression, bathe, breaststroke. duck, carry, sink, go down, dunk, go under. act (noun)
swimming.
bath (noun)
jump, plunge, dive, aquatic contest, swimming race, dip, splash.
swim (noun)
float, swimming.

v.

make way through water using arms, legs (verb)
dive, bathe, crawl, float.

Other synonyms:

dunk. dip, duck. splash. Other relevant words:
breaststroke, dip, crawl, backstroke, dunk, duck, float, plunge, dive, bathe, bathing.

Usage examples for swim

  1. I swim as I like. – Verotchka's Tales by Mamin Siberiak
  2. I'll drop over the side and swim to the enemy. – The Boy Allies at Jutland by Robert L. Drake
  3. Get up and let's go for a swim – Neighbours by Robert Stead