What part of speech is the italicized word in the sentence below?
four (score) and seven years ago, our forefathers brought forth upon this continent a new nation conceived in liberty and dedicated to the proposition that all men are created equal.

It's a noun. "score" is another unit of measurement, much like "years" -- and "years" is a noun as well.

The italicized word given in the sentence above is the word "Score" and the part of speech that this word belongs is a noun. A noun is any word that serves as a name of a thing, person, animal, event, place, etc. In this case, this word is used as a noun and is described by an adjective "four". Hope this answers your question.

ih snhi snixshjxenoj d hi din d in dind chincdih

Ido have a poem that i wrote in my english class if you would like it.