fort vs forgather

fort is a noun but forgather is not a noun.

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

As verbs, forgather is a hypernym of fort; that is, forgather is a word with a broader meaning than fort:

Other hypernyms of fort include assemble, foregather, gather, meet.

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

fort (verb)	forgather (verb)
station (troops) in a fort	collect in one place
enclose by or as if by a fortification
gather in, or as if in, a fort, as for protection or defense