hobnail vs furnish

hobnail is a noun but furnish is not a noun.

Word	Noun	Adjective	Verb	Adverb
hobnail	Yes	No	Yes	No
furnish	No	No	Yes	No

As verbs, furnish is a hypernym of hobnail; that is, furnish is a word with a broader meaning than hobnail:

Other hypernyms of hobnail include offer, provide, render, supply.

hobnail (noun)	furnish (noun)
a short nail with a thick head; used to protect the soles of boots

hobnail (verb)	furnish (verb)
supply with hobnails	give something useful or necessary to
	provide or equip with furniture