Synonyms|165Antonyms|27|Broader|3Narrower|0Related|49
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grand
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heavy(great, extraordinary, outstanding, notable)
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heavyweight(great, extraordinary, outstanding, notable)
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highly memorable
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history-making
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immortal
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indestructible
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influential
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magnificent
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major-league(great, extraordinary, outstanding, notable)
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matchless
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not forgettable(expression, idiom)
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not to be forgotten(adjective, memorable)
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of importance(expression, idiom, importance)
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of note(expression, idiom, importance)
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overlooked
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permanent
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pre-eminent
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precious(adjective, valued)
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prized(adjective, valued)
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APASmart Define. (2016). unforgettable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unforgettable/thesaurus/synonyms
ChicagoSmart Define. 2016. "unforgettable thesaurus" https://smartdefine.org/unforgettable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, unforgettable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unforgettable/thesaurus/synonyms>.
MLASmart Define. "unforgettable thesaurus" 1 April 2016. Web. 26 September 2026. <https://smartdefine.org/unforgettable/thesaurus/synonyms>