seven vs seven-spot

seven and seven-spot both are nouns.

Word	Noun	Adjective	Verb	Adverb
seven	Yes	Yes	No	No
seven-spot	Yes	No	No	No

As nouns, seven and seven-spot are synonyms defined as:

seven and seven-spot: one of four playing cards in a deck with seven pips on the face

seven (noun)	seven-spot (noun)
one of four playing cards in a deck with seven pips on the face	one of four playing cards in a deck with seven pips on the face
the cardinal number that is the sum of six and one

seven (adjective)	seven-spot (adjective)
being one more than six