footmark vs footprint

footmark and footprint both are nouns.

Word	Noun	Adjective	Verb	Adverb
footmark	Yes	No	No	No
footprint	Yes	No	No	No

As nouns, footmark and footprint are synonyms defined as:

Other synonyms of footmark include step.

footmark (noun)	footprint (noun)
a mark of a foot or shoe on a surface	the area taken up by some object
	a mark of a foot or shoe on a surface
	a trace suggesting that something was once present or felt or otherwise important