effigy vs simulacrum

effigy and simulacrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
effigy	Yes	No	No	No
simulacrum	Yes	No	No	No

As nouns, effigy and simulacrum are synonyms defined as:

effigy and simulacrum: a representation of a person (especially in the form of sculpture)

Other synonyms of effigy include image.

effigy (noun)	simulacrum (noun)
a representation of a person (especially in the form of sculpture)	a representation of a person (especially in the form of sculpture)
	an insubstantial or vague semblance