investiture vs initiation

investiture and initiation both are nouns.

Word	Noun	Adjective	Verb	Adverb
investiture	Yes	No	No	No
initiation	Yes	No	No	No

As nouns, initiation is a hypernym of investiture; that is, initiation is a word with a broader meaning than investiture:

Other hypernyms of investiture include induction, installation.

investiture (noun)	initiation (noun)
the ceremonial act of clothing someone in the insignia of an office; the formal promotion of a person to an office or rank	the act of starting something for the first time; introducing something new
the ceremony of installing a new monarch	an act that sets in motion some course of events
	wisdom as evidenced by the possession of knowledge
	a formal entry into an organization or position or office