methylene vs methylene radical

methylene and methylene radical both are nouns.

Word	Noun	Adjective	Verb	Adverb
methylene	Yes	No	No	No
methylene radical	Yes	No	No	No

As nouns, methylene and methylene radical are synonyms defined as:

methylene and methylene radical: the bivalent radical CH2 derived from methane

Other synonyms of methylene include methylene group.

methylene (noun)	methylene radical (noun)
the bivalent radical CH2 derived from methane	the bivalent radical CH2 derived from methane