uranyl group vs uranyl

uranyl group and uranyl both are nouns.

Word	Noun	Adjective	Verb	Adverb
uranyl group	Yes	No	No	No
uranyl	Yes	No	No	No

As nouns, uranyl group and uranyl are synonyms defined as:

uranyl group and uranyl: the bivalent radical UO2 which forms salts with acids

Other synonyms of uranyl group include uranyl radical.

uranyl group (noun)	uranyl (noun)
the bivalent radical UO2 which forms salts with acids	the bivalent radical UO2 which forms salts with acids