Is there a difference between sour and acid, or these can be used interchangeably?

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    The five elements of taste perception: salty, sour, bitter, sweet and umami. I'd assume acid is approximately a "synonym" for sour in the context of tastes. But figuratively, a sour remark is actually bitter, whereas an acid comment could well be an example of rubbing salt in your victim's wounds (it stings/burns). – FumbleFingers Aug 7 '15 at 14:40
  • Thanks, @FumbleFingers! So, acid is more caustic in all contexts, right? – Hexus Aug 7 '15 at 14:56
  • diffen.com/difference/Bitter_vs_Sour: "Sourness, on the other hand, is indicative of acidity." – amdn Aug 7 '15 at 15:05
  • With a little search it can be understood easily. – Rwy5 Aug 7 '15 at 15:24
  • It should be noted that some people seem to use both "sour" and "bitter" to describe the same taste, whether that taste is due to acid or base. This drives me crazy, but maybe there's a genuine physiological variation involved. – Doug Warren Aug 7 '15 at 15:58

Acidity, a chemical property, accounts for a sour taste.

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