Inthronize, a relatively uncommon word, is used to describe the act of placing someone on a throne or bestowing them with authority and power. Although it might be challenging to find direct synonyms for "inthronize", one could use alternative phrases or expressions to convey a similar meaning. Some potential options include "crowning", which signifies the act of placing a crown on someone's head, or "enthroning", which denotes the act of establishing someone in a position of power. Both terms encapsulate the essence of inthronize by emphasizing the act of granting authority and significance to an individual.