This is something I’ll admit that I’ve done in the past – just assumed that ‘these are the keywords consumers must be using’, but keyword research tools have shown a plethora of terms that I certainly wouldn’t have managed to come up with, and I agree that as the language of products evolve, we should do regular checks to ensure we’re keeping up with that evolution.
Of all the tools listed in this article, Moz Link explorer is an old one & quite popular.  If you want to compare backlinks between two or more domains, Open Site Explorer is worth trying. This tool works best when you have a paid account of SEOMOZ though a free version of this tool is good enough to get you started checking the backlinks of your site and the sites of your competitors.