I believe there is a term for words such as never, always, constantly, and so forth; words that generally exaggerate the situation being described. Unfortunately, I can't recall what that term is if I am correct in that there is indeed such a term. Can anyone help me with this question?
I may be misunderstanding the answer you're after, but I have a friend who chastises me for making blanket generalizations whenever I use a word like never or always in a sentence. (He's a smart guy.) Is that the phrase you're looking for?
In this case generalization means to make general or broad statements (often impossibly broad). Sometimes people also call these blanket statements.