skating rink vs rink

skating rink and rink both are nouns.

Word	Noun	Adjective	Verb	Adverb
skating rink	Yes	No	No	No
rink	Yes	No	No	No

As nouns, skating rink and rink are synonyms defined as:

skating rink and rink: building that contains a surface for ice skating or roller skating

skating rink (noun)	rink (noun)
building that contains a surface for ice skating or roller skating	building that contains a surface for ice skating or roller skating