| Word | Definitions | Synonyms |
|---|---|---|
| harden | (verb) become hard or harder | Synonyms: indurate |
| (verb) make hard or harder | Synonyms: indurate | |
| (verb) make healthy | Synonyms: season | |
| (verb) cause to accept or become hardened to; habituate | Synonyms: indurate, inure | |
| (verb) harden by reheating and cooling in oil | Synonyms: temper |