sodium hydroxide.

sodium monoxide.

sodium carbonate ( def. 2 ) .

sodium, as in carbonate of soda.

soda water.

a drink made with soda water, flavoring, such as fruit or other syrups, and often ice cream, milk, etc.

soda pop.

(in faro) the card turned up in the dealing box before one begins to play.

noun

beverage , drink , mixer , pop , seltzer , tonic