| Word | Definitions | Synonyms |
|---|---|---|
| buoy | (noun) a float attached by rope to the seabed to mark channels in a harbor or underwater hazards; typically brightly-coloured | - |
| buoyancy | (noun) the property of something weightless and insubstantial | Synonyms: airiness |
| (noun) irrepressible liveliness and good spirit | Synonyms: irrepressibility | |
| (noun) the tendency to float in water or other liquid | - | |
| (noun) cheerfulness that bubbles to the surface | Synonyms: perkiness |