acid

As nouns the difference between casting and acid

is that casting is casting while acid is acid (a food with a sharp taste).

As an adjective acid is

acid; sour; tart (having a sharp taste such as that of vinegar or a lemon).

As an adjective acid

is acid; sour; tart (having a sharp taste such as that of vinegar or a lemon).

As a noun acid

is acid (a food with a sharp taste).

As an initialism tap is

.

As adjectives the difference between cat and acid

is that cat is how much while acid is acid; sour; tart (having a sharp taste such as that of vinegar or a lemon).

As an adverb cat

is how much.

As a noun acid is

acid (a food with a sharp taste).

Keen is a related term of acid.

As adjectives the difference between keen and acid

is that keen is showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense while acid is acid; sour; tart (having a sharp taste such as that of vinegar or a lemon).

As nouns the difference between keen and acid

is that keen is a prolonged wail for a deceased person while acid is acid (a food with a sharp taste).

As a verb keen

is (rare) to sharpen; to make cold or keen can be to utter a keen.

Penetrating is a related term of acid.

As adjectives the difference between penetrating and acid

is that penetrating is able to pierce or penetrate while acid is acid; sour; tart (having a sharp taste such as that of vinegar or a lemon).

As a verb penetrating

is .

As a noun acid is

acid (a food with a sharp taste).

As adjectives the difference between acid and toxic

is that acid is acid; sour; tart (having a sharp taste such as that of vinegar or a lemon) while toxic is toxic.

As a noun acid

is acid (a food with a sharp taste).