acerb

As a noun tang

is pliers.

As an adjective acerb is

sour, bitter, and harsh to the taste, as unripe fruit.

As adjectives the difference between sour and acerb

is that sour is having an acidic, sharp or tangy taste while acerb is sour, bitter, and harsh to the taste, as unripe fruit.

As a noun sour

is the sensation of a sour taste.

As a verb sour

is (label) to make sour.

As adjectives the difference between acidic and acerb

is that acidic is having a pH less than 7, or being sour, or having the strength to neutralize alkalis, or turning a litmus paper red while acerb is sour, bitter, and harsh to the taste, as unripe fruit.

As an adjective acerb

is sour, bitter, and harsh to the taste, as unripe fruit.

As a noun acer is

.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective acerb is

sour, bitter, and harsh to the taste, as unripe fruit.