temptress vs femme fatale

temptress and femme fatale both are nouns.

Word	Noun	Adjective	Verb	Adverb
temptress	Yes	No	No	No
femme fatale	Yes	No	No	No

As nouns, temptress and femme fatale are synonyms defined as:

temptress and femme fatale: a woman who is considered to be dangerously seductive

Other synonyms of temptress include Delilah, enchantress, siren.

temptress (noun)	femme fatale (noun)
a woman who is considered to be dangerously seductive	a woman who is considered to be dangerously seductive