European plan vs hotel plan

European plan and hotel plan both are nouns.

Word	Noun	Adjective	Verb	Adverb
European plan	Yes	No	No	No
hotel plan	Yes	No	No	No

As nouns, hotel plan is a hypernym of European plan; that is, hotel plan is a word with a broader meaning than European plan:

European plan: a hotel plan that provides a continental breakfast daily
hotel plan: a plan and a room rate for providing a room and meals to guests at a hotel

Other hypernyms of European plan include meal plan.

European plan (noun)	hotel plan (noun)
a hotel plan that provides a continental breakfast daily	a plan and a room rate for providing a room and meals to guests at a hotel