abatis, advanced work, affirmation, attestation, authentication, backing, backing up, balistraria, bank, banquette, barbed-wire entanglement, barbican, barricade, barrier, bartizan, bastion, battlement, bearing out, bolstering, breastwork, bulwark, buttressing, case hardening, casemate, certification, cheval-de-frise, circumstantiation, circumvallation, confirmation, contravallation, corroboration, corroboratory evidence, counterscarp, curtain, demibastion, dike, documentation, drawbridge, earthwork, enclosure, enrichment, entanglement, escarp, escarpment, fence, fieldwork, fortalice, glacis, hardening, invigoration, loophole, lunette, machicolation, mantelet, merlon, mound, outwork, palisade, parados, parapet, portcullis, postern gate, proof, proving, proving out, rampart, ratification, ravelin, redan, redoubt, refreshment, reinforcement, reinvigoration, restoration, restrengthening, revivification, sally port, scarp, sconce, stockade, strengthening, substantiation, support, supporting evidence, tempering, tenaille, undergirding, validation, vallation, vallum, verification, vitaminization, work