appoggiatura vs grace note

appoggiatura and grace note both are nouns.

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

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

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

Other synonyms of appoggiatura include acciaccatura.

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