bolster
1. [ verb ] support; of morale, theories, etc.
Synonyms: support bolster_up
Related terms: reinforce dramaturgy
2. [ noun ] a pillow that is often put across a bed underneath the regular pillows
Synonyms: long_pillow
Related terms: pillow
3. [ verb ] prop up with a pillow or bolster
Related terms: prop_up
4. [ noun ] Last name, frequency rank in the U.S. is 16245
5. [ verb ] add padding to
Synonyms: pad
Examples:

"pad the seat of the chair"

Related terms: fill pad
Similar spelling:   bolster_up