I think that if Hölder continuous functions deserve its own tag, questions related to Lipschitz function should have some tag, too. (Perhaps the same tag might be appropriate, but I like the idea of having a separate tag for them better.)

@MartinSleziak My personal preference is to consider $C^{0,1}$ a special case of $C^{0,\alpha}$ (which is reflected in how I wrote the tag wiki). But I can see how from a historical point of view Lipschitz may deserve a separate tag. One possibility is to make a synonym.