crotchet vs quirk

crotchet and quirk both are nouns.

Word	Noun	Adjective	Verb	Adverb
crotchet	Yes	No	No	No
quirk	Yes	No	Yes	No

As nouns, crotchet and quirk are synonyms defined as:

Other synonyms of crotchet include oddity, queerness, quirkiness.

crotchet (noun)	quirk (noun)
a small tool or hooklike implement	a narrow groove beside a beading
a strange attitude or habit	a strange attitude or habit
a musical note having the time value of a quarter of a whole note
a sharp curve or crook; a shape resembling a hook

crotchet (verb)	quirk (verb)
	twist or curve abruptly