excessive vs extravagant

excessive and extravagant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
excessive	No	Yes	No	No
extravagant	No	Yes	No	No

As adjectives, excessive and extravagant are synonyms defined as:

excessive and extravagant: unrestrained, especially with regard to feelings

Other synonyms of excessive include exuberant, overweening.

excessive (adjective)	extravagant (adjective)
beyond normal limits	unrestrained, especially with regard to feelings
unrestrained, especially with regard to feelings	recklessly wasteful