Synonyms of harden

Verb

1. harden, indurate, change

usage: become hard or harder; "The wax hardened"

2. harden, indurate, change

usage: make hard or harder; "The cold hardened the butter"

3. temper, harden, modify

usage: harden by reheating and cooling in oil; "temper steel"

4. season, harden, toughen

usage: make fit; "This trip will season even the hardiest traveller"

5. inure, harden, indurate, habituate, accustom

usage: cause to accept or become hardened to; habituate; "He was inured to the cold"

Definition and meaning of harden (Dictionary)