freewheeler vs free agent

freewheeler and free agent both are nouns.

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

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

Other synonyms of freewheeler include free spirit.

freewheeler (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