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Strengthen has 110 synonyms. The top synonyms for strengthen are complicate, affirm, circumstantiate, case harden, ramify, key up, condense, brace up and 102 more. Browse the full list below.
| Length
| Random | DefinitionA common synonym for strengthen is complicate. Other synonyms include affirm, circumstantiate, case harden, ramify.
Strengthen has 110 synonyms listed on Thesaurasize.
(v): to make strong or stronger; to add strength to; to increase the strenght of; as, to strengthen a limb, a bridge, an army; to strengthen an obligation; to strengthen authority; to fortify; to rein
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