bike parking rack vs bicycle parking rack

bike parking rack and bicycle parking rack both are nouns.

Word	Noun	Adjective	Verb	Adverb
bike parking rack	Yes	No	No	No
bicycle parking rack	Yes	No	No	No

As nouns, bike parking rack and bicycle parking rack are synonyms defined as:

Other synonyms of bike parking rack include bicycle rack, bicycle stand, bike rack, bike stand.

bike parking rack (noun)	bicycle parking rack (noun)
a rack for parking bicycles	a rack for parking bicycles