pink shower vs pink shower tree

pink shower and pink shower tree both are nouns.

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

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

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

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

pink shower (noun)	pink shower tree (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