duplicitous vs two-faced

duplicitous and two-faced both are adjectives.

Word	Noun	Adjective	Verb	Adverb
duplicitous	No	Yes	No	No
two-faced	No	Yes	No	No

As adjectives, duplicitous and two-faced are synonyms defined as:

duplicitous and two-faced: marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another

Other synonyms of duplicitous include ambidextrous, deceitful, double-dealing, double-faced, double-tongued, Janus-faced.

duplicitous (adjective)	two-faced (adjective)
marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another	marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another
	having two faces--one looking to the future and one to the past