crotchet vs quarter note

crotchet and quarter note both are nouns.

Word	Noun	Adjective	Verb	Adverb
crotchet	Yes	No	No	No
quarter note	Yes	No	No	No

As nouns, crotchet and quarter note are synonyms defined as:

crotchet and quarter note: a musical note having the time value of a quarter of a whole note

crotchet (noun)	quarter note (noun)
a small tool or hooklike implement	a musical note having the time value of a quarter of a whole note
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