ethyl group vs ethyl

ethyl group and ethyl both are nouns.

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

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

ethyl group and ethyl: the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom

Other synonyms of ethyl group include ethyl radical.

ethyl group (noun)	ethyl (noun)
the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom	the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom