appoggiatura vs acciaccatura

appoggiatura and acciaccatura both are nouns.

Word	Noun	Adjective	Verb	Adverb
appoggiatura	Yes	No	No	No
acciaccatura	Yes	No	No	No

As nouns, appoggiatura and acciaccatura are synonyms defined as:

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

Other synonyms of appoggiatura include grace note.

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