To support or shore up something.
To assume and carry successfully, as the part of an actor; to represent or act; to sustain.
To keep (a person or thing) from doing something; impede:
a pillow that is often put across a bed underneath the regular pillows
To strengthen (a military force) with additional personnel or equipment.
Sustain is defined as to support something or to endure a trial or hardship.
The definition of aid means to provide help or to provide some item or advice that will make something easier or that will solve a problem.
(Sports) To make a pass that leads directly towards scoring.
To assist in further development or progress:
To cover or hide (something) with or as if with a cushion.
To support by providing means of existence; bear the expenses of
To keep from yielding or failing during stress or difficulty
To lengthen (a speech or piece of writing) with unnecessary or irrelevant material
(Rare) To rest the head on or as on a pillow
To keep erect; to support; to sustain; to keep from falling; to maintain.
To weaken by wearing away a base or foundation:
(Intransitive) To provide assistance.
support and strengthen
To lift up or keep up in spirits; encourage
Find another word for bolster. In this page you can discover 28 synonyms, antonyms, idiomatic expressions, and related words for bolster, like: prop, hold up, support, prevent, long pillow, reinforce, sustain, aid, assist, boost and cushion.