rubber in WordNet English dictionary

1. a waterproof overshoe that protects shoes from water or snow
   arctic  galosh  golosh  rubber  gumshoe 
   
2. an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
   rubber  natural rubber  India rubber  gum elastic  caoutchouc 
   
3. contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
   condom  rubber  safety  safe  prophylactic 
   
4. an eraser made of rubber (or of a synthetic material with properties similar to rubber); commonly mounted at one end of a pencil
   rubber eraser  rubber  pencil eraser 
   
5. any of various synthetic elastic materials whose properties resemble natural rubber
   rubber  synthetic rubber 
   

1. returned for lack of funds
   "a rubber check"; "a no-good check"
   rubber  no-good 
   

1. coat or impregnate with rubber
   "rubberize fabric for rain coats"
   rubberize  rubberise  rubber