The difference between Leech and Sponger
When used as nouns, leech means an aquatic blood-sucking annelid of class hirudinea, especially , whereas sponger means one who uses a sponge.
Leech is also verb with the meaning: to apply a leech medicinally, so that it sucks blood from the patient.
check bellow for the other definitions of Leech and Sponger
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Leech as a noun:
An aquatic blood-sucking annelid of class Hirudinea, especially .
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Leech as a noun (figuratively):
A person who derives profit from others in a parasitic fashion.
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Leech as a noun (medicine, dated):
A glass tube designed for drawing blood from damaged tissue by means of a vacuum.
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Leech as a verb (transitive):
To apply a leech medicinally, so that it sucks blood from the patient.
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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."
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Leech as a noun (archaic):
A physician.
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Leech as a noun (paganism, Heathenry):
A healer.
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Leech as a verb (archaic, rare):
To treat, cure or heal.
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Leech as a noun (nautical):
The vertical edge of a square sail.
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Leech as a noun (nautical):
The aft edge of a triangular sail.
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Sponger as a noun:
One who uses a sponge.
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Sponger as a noun:
A parasitic hanger-on.
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Sponger as a noun:
A person or vessel employed in gathering sponges from the sea.
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Sponger as a noun:
A device for sponging cloth by means of a perforated adjustable cylinder.