Hardness is a word. It is a word in the phrase most hardness scale
no one likes your Hardness! hardness is not a good character.
the scientific word for hardness is density
The noun 'hardness' is an abstract noun as a word for the difficulty of something.The noun 'hardness' is a concrete noun as a word for a physical property of something.
No other gemstone has the hardness of a diamond.
Hardness
The Mohs scale compares the hardness of an object or substance.
The Mohs Scale is what is used to measure the relative hardness, or scratch resistance, of minerals. Mohs hardness often agrees with absolute hardness, which is another way of measuring the relative hardness of minerals.
It does no good to avenge a wrong, it only perpetuates the hardness of heart.
The rock I picked up had very good hardness and luster.
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