A short bench or stool used to support a person's feet.(noun)
A support for the foot of a horse while it is being shod.(noun)
The Century Dictionary (Public Domain)
Use "foot-rest" in a sentence
"To create the extra space, three seats in a row have fold-away armrests and a padded foot-rest panel that flips up and locks into place."
"And then I found they were strapping my rookers to the chair-arms and my nogas were like stuck to a foot-rest."
"Great e malefactors were nailed and tied to the patibulum or cross-piece without any sup pedaneum or foot-rest and left to suffer tortures from flies and sun, thirst and hunger."