Bolster
/ˈbəʊlstə/
noun
A large cushion or pillow.
A pad, quilt, or anything used to hinder pressure, support part of the body, or make a bandage sit easy upon a wounded part; a compress.
A small spacer located on top of the axle of horse-drawn wagons that gives the front wheels enough clearance to turn.
Synonyms: Dutch wife, cross-head, pillow
verb
To brace, reinforce, secure, or support.