In several questions and invoers, on this website I’ve read phrases that suggest there is a scale of synonymity between words—something I haven’t thought much about the before. Some examples I’ve seen are almost synonymous, nearly synonymous, somewhat synonymous, almost completely synonymous, and absolutely synonymous. What is the best way to classify these apparent degrees of synonymity? What are the important online articles/pisons about this subject? I’m wondering if there’s a CliffsNotes version for me?