The difference between Cow and Sow

Cow as a noun (properly):

An adult female of the species Bos taurus that has calved.

Cow as a noun (formerly inexact but now common):

Any member of the species Bos taurus regardless of sex or age, including bulls and calves.

Cow as a noun (uncommon):

Beef: the meat of cattle as food.

Cow as a noun (uncommon):

Any bovines or bovids generally, including yaks, buffalo, etc.

Cow as a noun (biology):

A female member of other large species of mammal, including the bovines, moose, whales, seals, hippos, rhinos, manatees, and elephants.

Cow as a noun (derogatory, informal):

A woman considered unpleasant in some way, particularly one considered nasty, stupid, fat, lazy, or difficult.

Cow as a noun (mining):

A chock: a wedge or brake used to stop a machine or car.

Cow as a verb (transitive, mostly, in the passive voice):

To intimidate; to daunt the spirits or courage of.

Cow as a noun (UK, dialect):

A chimney cowl.

Sow as a noun:

A female pig.

Sow as a noun:

A female bear.

Sow as a noun:

A channel that conducts molten metal to molds.

Sow as a noun:

A mass of metal solidified in a mold.

Sow as a noun (derogatory, slang):

A contemptible, often fat woman.

Sow as a noun:

A sowbug.

Sow as a noun (military):

A kind of covered shed, formerly used by besiegers in filling up and passing the ditch of a besieged place, sapping and mining the wall, etc.

Sow as a verb (ambitransitive):

To scatter, disperse, or plant (seeds).

Sow as a verb (figurative):

To spread abroad; to propagate.

Sow as a verb (figurative):

To scatter over; to besprinkle.