The word encore is a noun. The plural form is encores.
You mean 'encore' meaning an extra performance at the end of a show because the audience shouts for it. A Noun
Life - Part 2 - 2007 Encore Careers was released on: USA: 29 October 2009
Final Curtain Part 7 - Encore - 2005 was released on: USA: 14 October 2005 (Cumberland, Rhode Island)
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
Life - Part 2 2007 Generation Gaps was released on: USA: 10 September 2009
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.