Meh, I still don't like the definition you're using, because "awkwardness" refers to behavior, not cognition; and "anxiety" refers to feelings and beliefs, not behavior. A person can behave in a socially awkward way not because of ignorance or fear but because of temporary conditions (e.g., a diabetic experiencing low blood sugar). A person can feel social anxiety but do a good job of masking it and behave normally. If you're referring to ignorance of or inability to learn social practices, then I think it would be better to call it that ("social ignorance," "social learning disability" or something).

Not that it matters to your main point, so I'm sorry for getting all terminology-nit-picky on you.