excursion vs expedition

excursion and expedition both are nouns.

Word	Noun	Adjective	Verb	Adverb
excursion	Yes	No	No	No
expedition	Yes	No	No	No

As nouns, excursion and expedition are synonyms defined as:

Other synonyms of excursion include jaunt, junket, outing, pleasure trip, sashay.

excursion (noun)	expedition (noun)
a journey taken for pleasure	a journey organized for a particular purpose
wandering from the main path of a journey	a military campaign designed to achieve a specific objective in a foreign country
	a journey taken for pleasure
	the property of being prompt and efficient
	an organized group of people undertaking a journey for a particular purpose