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Pronunciation varies by accent · noun
A rubbery polymer formed by cross-linking of polyvinyl alcohol with a boron compound, used as a plaything or to demonstrate physical properties..
Use flubber when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Flubber means A rubbery polymer formed by cross-linking of polyvinyl alcohol with a boron compound, used as a plaything or to demonstrate physical properties..
Common synonyms include slime.
The opposite depends on the specific sense.
Use flubber where its definition matches the intended context.
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