quintuplet vs digit

quintuplet and digit both are nouns.

Word	Noun	Adjective	Verb	Adverb
quintuplet	Yes	No	No	No
digit	Yes	No	No	No

As nouns, digit is a hypernym of quintuplet; that is, digit is a word with a broader meaning than quintuplet:

Other hypernyms of quintuplet include figure.

quintuplet (noun)	digit (noun)
a set of five similar things considered as a unit	a finger or toe in human beings or corresponding body part in other vertebrates
one of five children born at the same time from the same pregnancy	one of the elements that collectively form a system of numeration
the cardinal number that is the sum of four and one	the length of breadth of a finger used as a linear measure