double-dealing vs dissimulation

double-dealing and dissimulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
double-dealing	Yes	Yes	No	No
dissimulation	Yes	No	No	No

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

double-dealing: acting in bad faith; deception by pretending to entertain one set of intentions while acting under the influence of another
dissimulation: the act of deceiving

Other hypernyms of double-dealing include deceit, deception, dissembling.

double-dealing (noun)	dissimulation (noun)
acting in bad faith; deception by pretending to entertain one set of intentions while acting under the influence of another	the act of deceiving

double-dealing (adjective)	dissimulation (adjective)
marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another