free agent vs freewheeler

free agent and freewheeler both are nouns.

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

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

Other synonyms of free agent include free spirit.

free agent (noun)	freewheeler (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