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XXI has 2 synonyms. The top synonyms for XXI are twenty-one, cardinal. Another word for XXI is twenty-one. Browse the full list below.
| Length
| Random | DefinitionA common synonym for XXI is twenty-one. Other synonyms include cardinal.
XXI has 2 synonyms listed on Thesaurasize.
(n): the cardinal number that is the sum of twenty and one (adj): being one more than twenty
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