As nouns the difference between quack and quackism

is that quack is the sound made by a duck while quackism is behaviour of a quack; quackery.

As a verb quack

is to make a noise like a duck.

As an adjective quack

is falsely presented as having medicinal powers.

As nouns the difference between quackery and quackism

is that quackery is (legal|medicine|uncountable) the practice of fraudulent medicine, usually in order to make money or for ego gratification and power; health fraud while quackism is behaviour of a quack; quackery.

As adjectives the difference between quaint and quaintish

is that quaint is (obsolete) of a person: cunning, crafty while quaintish is somewhat quaint.

As a noun quaint

is (archaic) the vulva.

As a verb withstand

is to resist or endure (something) successfully.

As an adjective quakeproof is

capable of withstanding an earthquake.

As a noun earthquake

is a shaking of the ground, caused by volcanic activity or movement around geologic faults.

As an adjective quakeproof is

capable of withstanding an earthquake.

As nouns the difference between quaker and quakeress

is that quaker is quaker (believer of the quaker faith) while quakeress is (dated) a female quaker.

As nouns the difference between mongrel and mongrelism

is that mongrel is someone or something of mixed kind or uncertain origin; especially , a dog that is such while mongrelism is (uncountable) the condition of being a mongrel.

As nouns the difference between brain and cinerea

is that brain is the control center of the central nervous system of an animal located in the skull which is responsible for perception, cognition, attention, memory, emotion, and action while cinerea is (anatomy) the grey matter of the brain.

As a verb brain

is to dash out the brains of; to kill by smashing the skull.

As a noun nitwit

is a scatterbrained or stupid person.

As an adjective nitwitted is

being like a nitwit; being stupid or foolish.

As an adjective crepuscular

is of or resembling twilight; dim.

As a noun crepuscularity is

the quality of being crepuscular.