expedition vs excursion

expedition and excursion both are nouns.

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

As nouns, expedition and excursion are synonyms defined as:

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

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