Synonyms for Life jacket:

n.

bollard, buoy, lifebelt, ballast, blade, anchor, inboard motor, flotation device, life preserver. flotation device (noun)
life preserver, life vest, buoy, cork jacket.
life jacket (noun)
life vest, cork jacket.

Other synonyms:

flotation device, ballast, lifebelt, bollard, inboard motor, life preserver. buoy. blade, anchor. Other relevant words:
cork jacket, buoy.