alcohol group vs group

alcohol group and group both are nouns.

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

As nouns, group is a hypernym of alcohol group; that is, group is a word with a broader meaning than alcohol group:

alcohol group: the chemical group -OH
group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of alcohol group include chemical group, radical.

alcohol group (noun)	group (noun)
the chemical group -OH	any number of entities (members) considered as a unit
	a set that is closed, associative, has an identity element and every element has an inverse
	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

alcohol group (verb)	group (verb)
	arrange into a group or groups
	form a group or group together