fantabulous vs excellent

fantabulous and excellent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fantabulous	No	Yes	No	No
excellent	No	Yes	No	No

As adjectives, fantabulous and excellent are synonyms defined as:

Other synonyms of fantabulous include first-class, mean, ripping, splendid.

fantabulous (adjective)	excellent (adjective)
very good; of the highest quality	very good; of the highest quality