Synonyms of fastness
- 1 Syllable
- fort, speed, château
- 2 Syllables
- castle, donjon, redoubt, stronghold, haste, fasthold, hardness, fleetness
- 3 Syllables
- fortresses, citadel, steadiness, sturdiness, defense, citadels, safehold, presidio, hardnesses
- 4 Syllables
- rapidity, acropolis
- 5 Syllables
- fortification, fortifications