The difference between Bed and Layer
When used as nouns, bed means a piece of furniture, usually flat and soft, for resting or sleeping on. a prepared spot to spend the night in. one's place of sleep or rest. sleep, whereas layer means an item of clothing worn under or over another.
When used as verbs, bed means senses relating to a bed as a place for resting or sleeping. to go to a bed. to place in a bed. to put oneself to sleep. to furnish with a bed or bedding. to have sexual intercourse with, whereas layer means to cut or divide (something) into layers.
check bellow for the other definitions of Bed and Layer
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Bed as a noun (usually after a preposition):
A piece of furniture, usually flat and soft, for resting or sleeping on. A prepared spot to spend the night in. One's place of sleep or rest. Sleep; rest; getting to sleep. The time for going to sleep or resting in bed; bedtime. Time spent in a bed. Marriage. Sexual activity.
Examples:
"My cat often sleeps on my bed.<br />I keep a glass of water next to my bed when I sleep."
"When camping, he usually makes a bed for the night from hay and a blanket."
"Go to bed!  I had breakfast in bed this morning."
"He's been afraid of bed since he saw the scary film."
"I read until bed."
"Too much bed, not enough rest."
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Bed as a noun (printing, dated):
A place, or flat surface or layer, on which something else rests or is laid. The bottom of a body of water, such as an ocean, sea, lake, or river. An area where a large number of oysters, mussels, other sessile shellfish, or a large amount of seaweed is found. A garden plot. A foundation or supporting surface formed of a fluid. The superficial earthwork, or ballast, of a railroad. The platform of a truck, trailer, railcar, or other vehicle that supports the load to be hauled. A shaped piece of timber to hold a cask clear of a ship's floor; a pallet. The flat part of the press, on which the form is laid. The flat surface of a scanner on which a document is placed to be scanned. A piece of music, normally instrumental, over which a radio DJ talks. Any of the sections of a dartboard with a point value, delimited by a wire.
Examples:
"The meats and cheeses lay on a bed of lettuce."
"sea bed;  river bed;  lake bed;  There's a lot of trash on the bed of the river."
"Oysters are farmed from their beds."
"We added a new bush to our rose bed."
"A bed of concrete makes a strong subsurface for an asphalt parking lot."
"The parcels were loaded onto the truck bed before transportation."
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Bed as a noun:
A layer or surface. A deposit of ore, coal, etc. the smallest division of a geologic formation or stratigraphic rock series marked by well-defined divisional planes (bedding planes) separating it from layers above and below. The horizontal surface of a building stone. The lower surface of a brick, slate, or tile. A course of stone or brick in a wall.
Examples:
"the upper and lower beds'"
"rfquotek Knight"
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Bed as a verb (transitive):
Senses relating to a bed as a place for resting or sleeping. To go to a bed. To place in a bed. To put oneself to sleep. To furnish with a bed or bedding. To have sexual intercourse with.
Examples:
"rfquotek Francis Bacon"
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Bed as a verb (transitive):
Senses relating to a bed as a place or layer on which something else rests or is laid. To lay or put in any hollow place, or place of rest and security, surrounded or enclosed; to embed. To set in a soft matrix, as paving stones in sand, or tiles in cement. To set out (plants) in a garden bed. To dress or prepare the surface of (stone) so it can serve as a bed. To lay flat; to lay in order; to place in a horizontal or recumbent position. To settle, as machinery.
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Layer as a noun:
A single thickness of some material covering a surface. An item of clothing worn under or over another.
Examples:
"Wrap the loaf in two layers of aluminum foil before putting it in the oven."
"After the first coat of paint dried, he applied another layer."
"It's cold now but it will warm up this afternoon. Make sure you wear layers."
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Layer as a noun:
A (usually) horizontal deposit; a stratum.
Examples:
"I find seven-layer cake a bit too rich."
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Layer as a noun:
One of the items in a hierarchy.
Examples:
"mired in layers of deceit"
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Layer as a verb (ambitransitive):
to cut or divide (something) into layers
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Layer as a verb (ambitransitive):
to arrange (something) in layers.
Examples:
"Layer the ribbons on top of one another to make an attractive pattern."
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Layer as a noun:
A person who lays things, such as tiles.
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Layer as a noun:
A mature female bird, insect, etc. that is able to lay eggs.
Examples:
"When dealing with an infestation of headlice, the first step is to eliminate the layers."
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Layer as a noun:
A hen kept to lay eggs.
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Layer as a noun:
A shoot of a plant, laid underground for growth.