voting age vs eld

voting age and eld both are nouns.

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

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

voting age: the age at which a person is old enough to vote in public elections
eld: a time of life (usually defined in years) at which some particular qualification or power arises

Other hypernyms of voting age include age.

voting age (noun)	eld (noun)
the age at which a person is old enough to vote in public elections	a late time of life
	a time of life (usually defined in years) at which some particular qualification or power arises