oven vs roaster

oven

• A chamber used for baking or heating. 

• To cook in an oven (colloquial and informal usage only) 

roaster

• A kitchen utensil used for roasting. 

• A hot Jupiter. 

• An objectionable person; somebody making a fool of themselves. 

• A chicken, pig, etc. suitable for roasting. 

• One who roasts or banters, especially as a comedy routine. 

• One who roasts food. 

• A furnace used in making ball soda.