redoubt

English Thesaurus

1. an entrenched stronghold or refuge (noun.artifact)

hypernym	:	fastness, stronghold,
definition	:	a strongly fortified defensive structure (noun.artifact)

2. (military) a temporary or supplementary fortification; typically square or polygonal without flanking defenses (noun.artifact)

hypernym	:	fortification, munition,
definition	:	defensive structure consisting of walls or mounds built around a stronghold to strengthen it (noun.artifact)

domain category	:	armed forces, armed services, military, military machine, war machine,
definition	:	the military forces of a nation (noun.group)