Murphy's Law vs gnome

Murphy's Law and gnome both are nouns.

Word	Noun	Adjective	Verb	Adverb
Murphy's Law	Yes	No	No	No
gnome	Yes	No	No	No

As nouns, gnome is a hypernym of Murphy's Law; that is, gnome is a word with a broader meaning than Murphy's Law:

Murphy's Law: humorous axiom stating that anything that can go wrong will go wrong
gnome: a short pithy saying expressing a general truth

Murphy's Law (noun)	gnome (noun)
humorous axiom stating that anything that can go wrong will go wrong	a short pithy saying expressing a general truth
	a legendary creature resembling a tiny old man; lives in the depths of the earth and guards buried treasure