fort vs fortify

fort is a noun but fortify is not a noun.

Word	Noun	Adjective	Verb	Adverb
fort	Yes	No	Yes	No
fortify	No	No	Yes	No

As verbs, fort and fortify are synonyms defined as:

fort (noun)	fortify (noun)
a fortified defensive structure
a fortified military post where troops are stationed

fort (verb)	fortify (verb)
station (troops) in a fort	add alcohol to (beverages)
enclose by or as if by a fortification	make strong or stronger
gather in, or as if in, a fort, as for protection or defense	add nutrients to
	prepare oneself for a military confrontation
	enclose by or as if by a fortification