hostelry vs roadhouse

hostelry and roadhouse both are nouns.

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

As nouns, roadhouse is a hyponym of hostelry; that is, roadhouse is a word with a more specific, narrower meaning than hostelry:

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

Other hyponyms of hostelry include caravan inn, caravansary, caravanserai, khan, imaret, post house, posthouse.

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