self-aggrandizement vs self-aggrandisement

self-aggrandizement and self-aggrandisement both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-aggrandizement	Yes	No	No	No
self-aggrandisement	Yes	No	No	No

As nouns, self-aggrandizement and self-aggrandisement are synonyms defined as:

self-aggrandizement and self-aggrandisement: an act undertaken to increase your own power and influence or to draw attention to your own importance

Other synonyms of self-aggrandizement include ego trip.

self-aggrandizement (noun)	self-aggrandisement (noun)
an act undertaken to increase your own power and influence or to draw attention to your own importance	an act undertaken to increase your own power and influence or to draw attention to your own importance