footrest vs footstool

footrest and footstool both are nouns.

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

As nouns, footrest and footstool are synonyms defined as:

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

Other synonyms of footrest include ottoman, tuffet.

footrest (noun)	footstool (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