We found 4 dictionaries that define the word face-hardening:

General (4 matching dictionaries)

1. face-hardening, face-hardening: Collins English Dictionary
2. face-hardening: Wordnik
3. face-hardening: Dictionary.com
4. face-hardening: TheFreeDictionary.com

(Note: See face-harden as well.)

Definitions from WordNet (face-harden) ▸ verb:  harden steel by adding carbon ▸ Also see face-harden ▸ Words similar to face-hardening ▸ Usage examples for face-hardening ▸ Idioms related to face-hardening ▸ Wikipedia articles (New!) ▸ Words that often appear near face-hardening ▸ Rhymes of face-hardening ▸ Invented words related to face-hardening