double-crossing vs treachery

double-crossing and treachery both are nouns.

Word	Noun	Adjective	Verb	Adverb
double-crossing	Yes	No	No	No
treachery	Yes	No	No	No

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

Other hypernyms of double-crossing include betrayal, perfidy, treason.

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