seven-spot vs seven

seven-spot and seven both are nouns.

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

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

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

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