scum

As verbs the difference between cheat and scum

is that cheat is to violate rules in order to gain advantage from a situation while scum is to remove the layer of scum from (a liquid etc).

As nouns the difference between cheat and scum

is that cheat is someone who cheats (informal: cheater) while scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).

As nouns the difference between scaly and scum

is that scaly is (south africa) the scaly yellowfish, while scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).

As an adjective scaly

is covered or abounding with scales; as, a scaly fish.

As a verb scum is

to remove the layer of scum from (a liquid etc).

As nouns the difference between douchebag and scum

is that douchebag is a sterile container which holds the fluid used for giving a vaginal douche while scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).

As a verb scum is

to remove the layer of scum from (a liquid etc).

As nouns the difference between scum and scoundrel

is that scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water) while scoundrel is a mean, worthless fellow; a rascal; a villain; a person without honour or virtue.

As a verb scum

is to remove the layer of scum from (a liquid etc).

As nouns the difference between scum and sle

is that scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water) while sle is braces, suspenders (pair of straps for holding trousers/pants).

As a verb scum

is to remove the layer of scum from (a liquid etc).

As nouns the difference between scale and scum

is that scale is (obsolete) a ladder; a series of steps; a means of ascending or scale can be part of an overlapping arrangement of many small, flat and hard pieces of keratin covering the skin of an animal, particularly a fish or reptile or scale can be a device to measure mass or weight while scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).

As verbs the difference between scale and scum

is that scale is to change the size of something whilst maintaining proportion; especially to change a process in order to produce much larger amounts of the final product or scale can be to remove the scales of while scum is to remove the layer of scum from (a liquid etc).

As nouns the difference between scum and rubbish

is that scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water) while rubbish is garbage, junk, refuse, waste.

As verbs the difference between scum and rubbish

is that scum is to remove the layer of scum from (a liquid etc) while rubbish is to denounce, to criticise, to denigrate, to disparage.

As an adjective rubbish is

(chiefly|au|nz|british|colloquial) exceedingly bad; awful; terrible; crappy.

As an interjection rubbish is

(colloquial) expresses that something is exceedingly bad, terrible or awful.

Scum is a related term of recrement.

As nouns the difference between scum and recrement

is that scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water) while recrement is waste matter or dross.

As a verb scum

is to remove the layer of scum from (a liquid etc).

In uncountable|lang=en terms the difference between scum and spit

is that scum is (uncountable) a greenish water vegetation (such as algae), usually found floating on the surface of ponds while spit is (uncountable) saliva]], especially when [[expectorate|expectorated.

As nouns the difference between scum and spit

is that scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water) while spit is a rod on which meat is grilled (uk english) or broiled (us english) or spit can be (uncountable) saliva]], especially when [[expectorate|expectorated.

As verbs the difference between scum and spit

is that scum is to remove the layer of scum from (a liquid etc) while spit is to impale on a spit or spit can be (transitive) to evacuate (saliva or another substance) from the mouth.

As nouns the difference between scum and spittle

is that scum is (uncountable) a layer of impurities that accumulates at the surface of a liquid (especially molten metal or water) while spittle is spit, usually frothy and of a milky coloration.

As verbs the difference between scum and spittle

is that scum is to remove the layer of scum from (a liquid etc) while spittle is to dig or stir with a small spade.