1. (verb) keep afloat

• buoy up

1. (noun) bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards

• acoustic buoy
• can
• can buoy
• conical buoy
• nun
• nun buoy
• spar buoy

1. (noun) bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards

• point of reference
• reference
• reference point

2. (verb) float on the surface of water

• float
• swim

3. (verb) keep afloat

• hold
• hold up
• support
• sustain

4. (verb) mark with a buoy

• mark

1. (verb) float on the surface of water

• buoyant
• floaty

2. (verb) keep afloat

• buoyant
• floaty