shovelboard vs outdoor game

shovelboard and outdoor game both are nouns.

Word	Noun	Adjective	Verb	Adverb
shovelboard	Yes	No	No	No
outdoor game	Yes	No	No	No

As nouns, outdoor game is a hypernym of shovelboard; that is, outdoor game is a word with a broader meaning than shovelboard:

shovelboard: a game in which players use long sticks to shove wooden disks onto the scoring area marked on a smooth surface
outdoor game: an athletic game that is played outdoors

shovelboard (noun)	outdoor game (noun)
a game in which players use long sticks to shove wooden disks onto the scoring area marked on a smooth surface	an athletic game that is played outdoors