pink shower tree vs pink shower

pink shower tree and pink shower both are nouns.

Word	Noun	Adjective	Verb	Adverb
pink shower tree	Yes	No	No	No
pink shower	Yes	No	No	No

As nouns, pink shower tree and pink shower are synonyms defined as:

pink shower tree and pink shower: tropical American semi-evergreen tree having erect racemes of pink or rose-colored flowers; used as an ornamental

Other synonyms of pink shower tree include Cassia grandis, horse cassia.

pink shower tree (noun)	pink shower (noun)
tropical American semi-evergreen tree having erect racemes of pink or rose-colored flowers; used as an ornamental	tropical American semi-evergreen tree having erect racemes of pink or rose-colored flowers; used as an ornamental