Synonyms of bastion

1 Syllable
rock, prop
2 Syllables
support, rampart, outwork, redoubt, mainstay, stronghold, bulwark, fortress, breastwork
3 Syllables
citadel, battlement, parapet, vallation, defense, citadels, presidio, protection
4 Syllables
embattlement
5 Syllables
fortification, fortifications