bike rack vs bicycle parking rack

bike rack and bicycle parking rack both are nouns.

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

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

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

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