there's a schema browser (https://system.netsuite.com/help/helpcenter/en_US/srbrowser/Browser2018_1/script/record/vendor.html) or you can use the netsuite field explorer addon to look at them or write a quick snippet that spits them out into the console.

👍 Thanks Creece, that link works great for Vendor, not so much for what I'm after now which is "Items" spefically "Items" for resale.