double cross vs treachery

double cross and treachery both are nouns.

Word	Noun	Adjective	Verb	Adverb
double cross	Yes	No	Yes	No
treachery	Yes	No	No	No

As nouns, treachery is a hypernym of double cross; that is, treachery is a word with a broader meaning than double cross:

Other hypernyms of double cross include betrayal, perfidy, treason.

double cross (noun)	treachery (noun)
an act of betrayal	an act of deliberate betrayal
	betrayal of a trust

double cross (verb)	treachery (verb)
betray by double-dealing