Sights is a noun. It's the plural form of sight.
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
The first part of Australia to be sighted by James Cook was the southeastern corner of the continent.On 19 April 1770, officer of the watch, Lieutenant Zachary Hicks, sighted land and alerted Captain Cook. Cook made out low sandhills which he named Point Hicks, although he did not yet know whether they formed part of an island or a continent.
long-sighted
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.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.