heir vs inheritor

heir and inheritor both are nouns.

Word	Noun	Adjective	Verb	Adverb
heir	Yes	No	No	No
inheritor	Yes	No	No	No

As nouns, heir and inheritor are synonyms defined as:

heir and inheritor: a person who is entitled by law or by the terms of a will to inherit the estate of another

Other synonyms of heir include heritor.

heir (noun)	inheritor (noun)
a person who is entitled by law or by the terms of a will to inherit the estate of another	a person who is entitled by law or by the terms of a will to inherit the estate of another
a person who inherits some title or office