free spirit vs free agent

free spirit and free agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
free spirit	Yes	No	No	No
free agent	Yes	No	No	No

As nouns, free spirit and free agent are synonyms defined as:

Other synonyms of free spirit include freewheeler.

free spirit (noun)	free agent (noun)
someone acting freely or even irresponsibly	someone acting freely or even irresponsibly
	(sports) a professional athlete who is free to sign a contract to play for any team