drinking age vs eld

drinking age and eld both are nouns.

Word	Noun	Adjective	Verb	Adverb
drinking age	Yes	No	No	No
eld	Yes	No	No	No

As nouns, eld is a hypernym of drinking age; that is, eld is a word with a broader meaning than drinking age:

drinking age: the age at which is legal for a person to buy alcoholic beverages
eld: a time of life (usually defined in years) at which some particular qualification or power arises

Other hypernyms of drinking age include age.

drinking age (noun)	eld (noun)
the age at which is legal for a person to buy alcoholic beverages	a late time of life
	a time of life (usually defined in years) at which some particular qualification or power arises