footstool vs footrest

footstool and footrest both are nouns.

Word	Noun	Adjective	Verb	Adverb
footstool	Yes	No	No	No
footrest	Yes	No	No	No

As nouns, footstool and footrest are synonyms defined as:

footstool and footrest: a low seat or a stool to rest the feet of a seated person

Other synonyms of footstool include ottoman, tuffet.

footstool (noun)	footrest (noun)
a low seat or a stool to rest the feet of a seated person	a low seat or a stool to rest the feet of a seated person