Black Maria vs hearts

Black Maria and hearts both are nouns.

Word	Noun	Adjective	Verb	Adverb
Black Maria	Yes	No	No	No
hearts	Yes	No	No	No

As nouns, Black Maria and hearts are synonyms defined as:

Black Maria and hearts: a form of whist in which players avoid winning tricks containing hearts or the queen of spades

Black Maria (noun)	hearts (noun)
a form of whist in which players avoid winning tricks containing hearts or the queen of spades	a form of whist in which players avoid winning tricks containing hearts or the queen of spades