prop

nouns

a support placed beneath or against something to keep it from shaking or falling
is a type of (narrower)
supporting structure that holds up or provides a foundation
"the statue stood on a marble support"
any movable articles or objects used on the set of a play or movie
"before every scene he ran down his checklist of props"
a propeller that rotates to push against air

verbs

support by placing against something solid or rigid
"shore and buttress an old building"