Lucy in the sky with diamonds vs back breaker

Lucy in the sky with diamonds and back breaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lucy in the sky with diamonds	Yes	No	No	No
back breaker	Yes	No	No	No

As nouns, Lucy in the sky with diamonds and back breaker are synonyms defined as:

Lucy in the sky with diamonds and back breaker: street name for lysergic acid diethylamide

Other synonyms of Lucy in the sky with diamonds include acid, battery-acid, dose, dot, Elvis, loony toons, pane, superman, window pane, Zen.

Lucy in the sky with diamonds (noun)	back breaker (noun)
street name for lysergic acid diethylamide	street name for lysergic acid diethylamide