bicycle vs ordinary

bicycle and ordinary both are nouns.

As nouns, ordinary is a hyponym of bicycle; that is, ordinary is a word with a more specific, narrower meaning than bicycle:

bicycle: a wheeled vehicle that has two wheels and is moved by foot pedals
ordinary: an early bicycle with a very large front wheel and small back wheel

Other hyponyms of bicycle include bicycle-built-for-two, tandem, tandem bicycle, mountain bike, off-roader, all-terrain bike, ordinary bicycle, push-bike, safety bicycle, safety bike, velocipede, pedelec, E-bike, electronic bicycle, electronic bike.

bicycle (noun)	ordinary (noun)
a wheeled vehicle that has two wheels and is moved by foot pedals	a judge of a probate court
	the expected or commonplace condition or situation
	a clergyman appointed to prepare condemned prisoners for death
	an early bicycle with a very large front wheel and small back wheel
	(heraldry) any of several conventional figures used on shields

bicycle (adjective)	ordinary (adjective)
	not exceptional in any way especially in quality or ability or size or degree
	lacking special distinction, rank, or status; commonly encountered

bicycle (verb)	ordinary (verb)
ride a bicycle