wheeler vs pedaller

wheeler and pedaller both are nouns.

Word	Noun	Adjective	Verb	Adverb
wheeler	Yes	No	No	No
pedaller	Yes	No	No	No

As nouns, pedaller is a hypernym of wheeler; that is, pedaller is a word with a broader meaning than wheeler:

Other hypernyms of wheeler include pedaler.

wheeler (noun)	pedaller (noun)
a draft horse harnessed behind others and nearest the wheels of a vehicle	a person who rides a pedal-driven vehicle (as a bicycle)
someone who makes and repairs wooden wheels
a person who rides a bicycle
the man at the outermost end of the rank in wheeling