fort

(noun) a fortified military post where troops are stationed. Synonyms: garrison.

(noun) a fortified defensive structure. Synonyms: fortress.

(verb) gather in, or as if in, a fort, as for protection or defense. Synonyms: fort up.

(verb) enclose by or as if by a fortification. Synonyms: fortify.

(verb) station (troops) in a fort.