Difference between Acerbic and Caustic

ACERBIC vs CAUSTIC: NOUN

Caustic soda
The enveloping surface formed by light rays reflecting or refracting from a curved surface, especially one with spherical aberration.
A hydroxide of a light metal.
A caustic material or substance.
The envelope of reflected or refracted rays of light for a given surface or object.
Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.
A caustic curve or caustic surface.
Any chemical substance that burns or destroys living tissue

Of a substance, especially a strong acid; capable of destroying or eating away by chemical action
Harsh or corrosive in tone
Sarcastic or cutting; biting.
Given to making caustic remarks.
Sharp, bitter, cutting, biting, sarcastic
Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing.
Severe; satirical; sharp.
A curve to which the ray of light, reflected or refracted by another curve, are tangents, the reflecting or refracting curve and the luminous point being in one plane.
See under Lime.
The solid hydroxides potash, KOH, and soda, NaOH, or solutions of the same.
Nitrate of silver, lunar caustic.
A surface to which rays reflected or refracted by another surface are tangents. Caustic curves and surfaces are called catacaustic when formed by reflection, and diacaustic when formed by refraction.

The curved surface to which all the rays of a conical pencil of light entering a refractive medium are tangential.
Capable of burning, corroding, or destroying the tissue of animal substances. See causticity.
Figuratively, severely critical or sarcastic; cutting: as, a caustic remark.
The envelope of light rays reflected or refracted by a curved surface or object

Acerb, Acid, Sulphurous, Sulfurous, Sour, Sharp, Unpleasant, Acrid, Blistering, Virulent, Bitter, Astringent, Venomous, Vitriolic, Caustic

Acerb, Erosive, Destructive, Blistering, Sulphurous, Unpleasant, Virulent, Acid, Bitter, Sulfurous, Acrid, Venomous, Corrosive, Vitriolic, Acerbic

Acerb, Acid, Sulphurous, Sulfurous, Sour, Sharp, Unpleasant, Acrid, Blistering, Virulent, Bitter, Astringent, Venomous, Vitriolic, Caustic

Acerb, Erosive, Destructive, Blistering, Sulphurous, Unpleasant, Virulent, Acid, Bitter, Sulfurous, Acrid, Venomous, Corrosive, Vitriolic, Acerbic

These could be toxic, corrosive, caustic or flammable.
My favorite are the dust and caustic caverns.
Do not use caustic drain openers and cleaners.
Celerier M, Extensive abdominal surgery after caustic ingestion.
What are the health effects of caustic soda?
He was also famous for his caustic wit.
The bulk bag will be lifted, by the caustic hoist, to the bulk bag splitter mounted above the caustic mixing tank.
The cocoanut oil is first saponified with the caustic soda and then the caustic potash is added with constant stirring.
The superferritics are resistant in caustic evaporators, but their performance is probably strongly influenced by oxidizing contaminants in the caustic.
There is an older domestic conversion which uses a mixture of molten caustic soda and caustic potash.