Is the word lands a noun?

Yes, the Word 'lands' is the plural form for the singular noun 'land'. The noun land is a singular, common, concrete noun; a Word for an area that someone owns; an area of ground, especially one that is used for a particular purpose such as farming or building; the part of the Earth's surface that is not the ocean; a Word for a place or a thing.

The Word 'land' is also a verb: land, lands, landing, landed.