grace note vs acciaccatura

grace note and acciaccatura both are nouns.

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

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

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

Other synonyms of grace note include appoggiatura.

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