exploration vs expedition

exploration and expedition both are nouns.

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

As nouns, expedition is a hypernym of exploration; that is, expedition is a word with a broader meaning than exploration:

exploration (noun)	expedition (noun)
a careful systematic search	a journey organized for a particular purpose
to travel for the purpose of discovery	a military campaign designed to achieve a specific objective in a foreign country
a systematic consideration	a journey taken for pleasure
	the property of being prompt and efficient
	an organized group of people undertaking a journey for a particular purpose