The difference between Leech and Vampire

When used as nouns, leech means an aquatic blood-sucking annelid of class hirudinea, especially , whereas vampire means a mythological undead creature said to feed on the blood of the living.

When used as verbs, leech means to apply a leech medicinally, so that it sucks blood from the patient, whereas vampire means to drain of energy or resources.

check bellow for the other definitions of Leech and Vampire

Leech as a noun:

An aquatic blood-sucking annelid of class Hirudinea, especially .
Leech as a noun (figuratively):

A person who derives profit from others in a parasitic fashion.
Leech as a noun (medicine, dated):

A glass tube designed for drawing blood from damaged tissue by means of a vacuum.

Leech as a verb (transitive):

To apply a leech medicinally, so that it sucks blood from the patient.
Leech as a verb (transitive):

To drain (resources) without giving back.

Examples:

" Bert leeched hundreds of files from the BBS, but never uploaded anything in return."

Leech as a noun (archaic):

A physician.
Leech as a noun (paganism, Heathenry):

A healer.

Leech as a verb (archaic, rare):

To treat, cure or heal.

Leech as a noun (nautical):

The vertical edge of a square sail.
Leech as a noun (nautical):

The aft edge of a triangular sail.

Vampire as a noun:

A mythological undead creature said to feed on the blood of the living.
Vampire as a noun (colloquial):

A person with the medical condition Systemic lupus erythematosus, colloquially known as vampirism, with effects such as photosensitivity and brownish-red stained teeth.
Vampire as a noun:

A blood-sucking bat; vampire bat (Desmodus rotundus)
Vampire as a noun (figurative, derogatory):

A person who drains one's time, energy, money, etc.

Vampire as a verb (transitive, figurative):

To drain of energy or resources.

The difference between Leech and Vampire

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