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The word robust is an adjective, a word to describe a noun as strong, healthy, or successful: robust health, a robust economy, a robust business.
The noun form for the adjective is robustness.
Robust Redhorse was created in 1870.
By design. Of course it depends on what you mean by robust.
robust system protection tool
A robust round of applause came up from the crowd when the hometown hero entered the arena.