Search Result for "toughened": 
Wordnet 3.0

ADJECTIVE (2)

1. physically toughened;
- Example: "the tough bottoms of his feet"
[syn: tough, toughened]

2. made hard or flexible or resilient especially by heat treatment;
- Example: "a sword of tempered steel"
- Example: "tempered glass"
[syn: tempered, treated, hardened, toughened]

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3 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Toughen \Tough"en\, v. i. & t. [imp. & p. p. Toughened; p. pr. & vb. n. Toughening.] To grow or make tough, or tougher. [1913 Webster]
WordNet (r) 3.0 (2006):

toughened adj 1: physically toughened; "the tough bottoms of his feet" [syn: tough, toughened] [ant: tender, untoughened] 2: made hard or flexible or resilient especially by heat treatment; "a sword of tempered steel"; "tempered glass" [syn: tempered, treated, hardened, toughened] [ant: unhardened, untempered]
Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "toughened": annealed, backed, calcified, callous, calloused, case-hardened, crusted, crusty, crystallized, fossilized, granulated, hardened, hornified, incrusted, indurate, indurated, lapidified, ossified, petrified, reinforced, rigidified, sclerotic, set, solidified, steeled, stiffened, strengthened, tempered, vitrified