expo vs exposition

expo and exposition both are nouns.

Word	Noun	Adjective	Verb	Adverb
expo	Yes	No	No	No
exposition	Yes	No	No	No

As nouns, expo and exposition are synonyms defined as:

expo and exposition: a collection of things (goods or works of art etc.) for public display

Other synonyms of expo include exhibition.

expo (noun)	exposition (noun)
a collection of things (goods or works of art etc.) for public display	a systematic interpretation or explanation (usually written) of a specific topic
	an account that sets forth the meaning or intent of a writing or discourse
	(music) the section of a movement (especially in sonata form) where the major musical themes first occur
	a collection of things (goods or works of art etc.) for public display