roadhouse vs hostel

roadhouse and hostel both are nouns.

Word	Noun	Adjective	Verb	Adverb
roadhouse	Yes	No	No	No
hostel	Yes	No	No	No

As nouns, hostel is a hypernym of roadhouse; that is, hostel is a word with a broader meaning than roadhouse:

roadhouse: an inn (usually outside city limits on a main road) providing meals and liquor and dancing and (sometimes) gambling
hostel: a hotel providing overnight lodging for travelers

Other hypernyms of roadhouse include auberge, hostelry, inn, lodge.

roadhouse (noun)	hostel (noun)
an inn (usually outside city limits on a main road) providing meals and liquor and dancing and (sometimes) gambling	inexpensive supervised lodging (especially for youths on bicycling trips)
	a hotel providing overnight lodging for travelers