acciaccatura vs grace note

acciaccatura and grace note both are nouns.

Word	Noun	Adjective	Verb	Adverb
acciaccatura	Yes	No	No	No
grace note	Yes	No	No	No

As nouns, acciaccatura and grace note are synonyms defined as:

acciaccatura and grace note: an embellishing note usually written in smaller size

Other synonyms of acciaccatura include appoggiatura.

acciaccatura (noun)	grace note (noun)
an embellishing note usually written in smaller size	an embellishing note usually written in smaller size