Synonyms and Antonyms for harden

1. harden (v.)

become hard or harder

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2. face-harden (v.)

harden steel by adding carbon

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3. harden (v.)

make fit

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4. harden (v.)

harden by reheating and cooling in oil

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5. harden (v.)

cause to accept or become hardened to; habituate

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6. harden (v.)

make hard or harder

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