Mass card vs sympathy card

Mass card and sympathy card both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mass card	Yes	No	No	No
sympathy card	Yes	No	No	No

As nouns, sympathy card is a hypernym of Mass card; that is, sympathy card is a word with a broader meaning than Mass card:

Mass card: (Roman Catholic Church) a card sent to a bereaved family that says the sender has arranged for a Mass to be said in memory of the deceased
sympathy card: a card expressing sympathy

Mass card (noun)	sympathy card (noun)
(Roman Catholic Church) a card sent to a bereaved family that says the sender has arranged for a Mass to be said in memory of the deceased	a card expressing sympathy