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hardiness

noun

• robustness
• lustiness
• boldness
• daring
• hardihood
• fearlessness
• strength

antonyms

• timidity

sounds kind of like

• hair tonic
• hairy tongue
• hard news
• hard times
• hard-hitting
• hardening
• harding
• hardness
• heart massage
• heartening
• heartiness
• hoarding
• horridness
• hortensia
• hurriedness
• hurting