free agent vs free spirit

free agent and free spirit both are nouns.

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

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

Other synonyms of free agent include freewheeler.

free agent (noun)	free spirit (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