What is another word for toughening up?

Need synonyms for toughening up? Here's a list of similar words from our thesaurus that you can use instead.

Verb
Present participle for to make more strict or stringent
Verb
Present participle for to physically harden a substance or material, typically using a chemical process
Verb
Present participle for to reinforce the strength or sturdiness of
Verb
Present participle for to train or practice so as to be accustomed to a certain condition
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