ecotourism vs tourism

ecotourism and tourism both are nouns.

Word	Noun	Adjective	Verb	Adverb
ecotourism	Yes	No	No	No
tourism	Yes	No	No	No

As nouns, tourism is a hypernym of ecotourism; that is, tourism is a word with a broader meaning than ecotourism:

ecotourism: tourism to exotic or threatened ecosystems to observe wildlife or to help preserve nature
tourism: the business of providing services to tourists

Other hypernyms of ecotourism include touristry.

ecotourism (noun)	tourism (noun)
tourism to exotic or threatened ecosystems to observe wildlife or to help preserve nature	the business of providing services to tourists