epicenter vs epicentre

epicenter and epicentre both are nouns.

Word	Noun	Adjective	Verb	Adverb
epicenter	Yes	No	No	No
epicentre	Yes	No	No	No

As nouns, epicenter and epicentre are synonyms defined as:

epicenter and epicentre: the point on the Earth's surface directly above the focus of an earthquake

epicenter (noun)	epicentre (noun)
the point on the Earth's surface directly above the focus of an earthquake	the point on the Earth's surface directly above the focus of an earthquake