hoof-mark vs hoof mark

hoof-mark and hoof mark both are nouns.

Word	Noun	Adjective	Verb	Adverb
hoof-mark	Yes	No	No	No
hoof mark	Yes	No	No	No

As nouns, hoof-mark and hoof mark are synonyms defined as:

hoof-mark and hoof mark: a visible impression on a surface made by the hoof of an animal

Other synonyms of hoof-mark include hoofprint.

hoof-mark (noun)	hoof mark (noun)
a visible impression on a surface made by the hoof of an animal	a visible impression on a surface made by the hoof of an animal