ethyl group vs ethyl radical

ethyl group and ethyl radical both are nouns.

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

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

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

Other synonyms of ethyl group include ethyl.

ethyl group (noun)	ethyl radical (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