Synonyms|380Antonyms|79|Broader|7Narrower|21Related|160
3
hardness(noun, support, control, change, strength)
3
post
3
stableness(noun, support, control, change, strength)
3
steadfastness(noun, support, control, strength, balance)
3
sturdiness(noun, support, control, change, strength)
3
tower(noun, hold, keep, top, stronghold)
3
ward(noun, cover, position, guard, shield)
2
aplomb(noun, support, control, strength, balance)
2
asylum(noun, defense, refuge)
2
commitment
2
dedication
2
devotion
2
dungeon(noun, defense)
2
durability(noun, support, control, strength, balance)
2
equilibrium(noun, control, balance, firmness, stability)
2
faithfulness
2
fasthold(noun, hold, keep, stronghold, seat)
2
fleetness(noun, haste)
2
hurriedness(noun, haste)
2
hurry
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APASmart Define. (2015). fastness thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fastness/thesaurus/synonyms
ChicagoSmart Define. 2015. "fastness thesaurus" https://smartdefine.org/fastness/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, fastness thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fastness/thesaurus/synonyms>.
MLASmart Define. "fastness thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/fastness/thesaurus/synonyms>