self-aggrandisement vs self-aggrandizement

self-aggrandisement and self-aggrandizement both are nouns.

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

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

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

Other synonyms of self-aggrandisement include ego trip.

self-aggrandisement (noun)	self-aggrandizement (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