triumvirate vs triad

triumvirate and triad both are nouns.

Word	Noun	Adjective	Verb	Adverb
triumvirate	Yes	No	No	No
triad	Yes	No	No	No

As nouns, triad is a hypernym of triumvirate; that is, triad is a word with a broader meaning than triumvirate:

triumvirate: a group of three men responsible for public administration or civil authority
triad: three people considered as a unit

Other hypernyms of triumvirate include threesome, trinity, trio.

triumvirate (noun)	triad (noun)
a group of three men responsible for public administration or civil authority	a three-note major or minor chord; a note and its third and fifth tones
	three people considered as a unit
	a set of three similar things considered as a unit
	the cardinal number that is the sum of one and one and one