charmer vs dissembler

charmer and dissembler both are nouns.

Word	Noun	Adjective	Verb	Adverb
charmer	Yes	No	No	No
dissembler	Yes	No	No	No

As nouns, dissembler is a hypernym of charmer; that is, dissembler is a word with a broader meaning than charmer:

charmer: someone with an assured and ingratiating manner
dissembler: a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives

Other hypernyms of charmer include dissimulator, hypocrite, phoney, phony, pretender.

charmer (noun)	dissembler (noun)
a person who charms others (usually by personal attractiveness)	a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives
someone with an assured and ingratiating manner