The difference between Scorch and Singe

Scorch as a noun:

A slight or surface burn.

Scorch as a noun:

A discolouration caused by heat.

Scorch as a noun (phytopathology):

Brown discoloration on the leaves of plants caused by heat, lack of water or by fungi.

Scorch as a verb (transitive):

To burn the surface of something so as to discolour it

Scorch as a verb (transitive):

To wither, parch or destroy something by heat or fire, especially to make land or buildings unusable to an enemy

Scorch as a verb (ergative):

(To cause) to become scorched or singed

Scorch as a verb (intransitive):

To move at high speed (so as to leave scorch marks on the ground)

Scorch as a verb:

To burn; to destroy by, or as by, fire.

Scorch as a verb (transitive):

To attack with bitter sarcasm or virulence.

Scorch as a verb (intransitive, colloquial, dated):

To ride a bicycle furiously on a public highway.

Singe as a verb (transitive):

To burn slightly.

Singe as a verb (transitive):

To remove the nap of (cloth), by passing it rapidly over a red-hot bar, or over a flame, preliminary to dyeing it.

Singe as a verb (transitive):

To remove the hair or down from (a plucked chicken, etc.) by passing it over a flame.

Singe as a noun:

A burning of the surface; a slight burn.