Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun bolster

1 sense of bolster

Sense 1
bolster, long pillow -- (a pillow that is often put across a bed underneath the regular pillows)
       => pillow -- (a cushion to support the head of a sleeping person)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb bolster

3 senses of bolster

Sense 1
bolster, bolster up -- (support and strengthen; "bolster morale")
       => reinforce, reenforce -- (make stronger; "he reinforced the concrete")

Sense 2
bolster -- (prop up with a pillow or bolster)
       => prop up, prop, shore up, shore -- (support by placing against something solid or rigid; "shore and buttress an old building")

Sense 3
pad, bolster -- (add padding to; "pad the seat of the chair")
       => fill, fill up, make full -- (make full, also in a metaphorical sense; "fill a container"; "fill the child with pride")