self-aggrandisement vs ego trip

self-aggrandisement and ego trip both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-aggrandisement	Yes	No	No	No
ego trip	Yes	No	No	No

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

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

Other synonyms of self-aggrandisement include self-aggrandizement.

self-aggrandisement (noun)	ego trip (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