acid rock vs rock-and-roll

acid rock and rock-and-roll both are nouns.

Word	Noun	Adjective	Verb	Adverb
acid rock	Yes	No	No	No
rock-and-roll	Yes	No	No	No

As nouns, rock-and-roll is a hypernym of acid rock; that is, rock-and-roll is a word with a broader meaning than acid rock:

acid rock: a musical style that emerged in the 1960s; rock music inspired by or related to drug-induced experience
rock-and-roll: a genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western

Other hypernyms of acid rock include rock'n'roll, rock 'n' roll, rock, rock and roll, rock music.

acid rock (noun)	rock-and-roll (noun)
a musical style that emerged in the 1960s; rock music inspired by or related to drug-induced experience	a genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western