To swim, in Hebrew, is לִשְׂחוֹת (lees-KHOHT). The act of swimming is שְׂחִיָּה (skhee-YAH).
To row or to paddle is לַחְתּוֹר (lahkh-TOHR). The act of rowing or paddling - or swimming the crawl (which resembles rowing in its movement) is חֲתִירָה (khah-tee-RAH).
For example... אֲנִי אוֹהֵב לִשְׂחוֹת חֲתִירָה (ah-NEE oh-HEV lees-KHOT khah-tee-RAH) - I like to swim (the) crawl.