bumping this, I also still maintain that all bodypart expansion tags should be aliased to their growth equivalent.

Also a note on those mentioning growth being gradual(over time) while expansion being something that is basicly rapid change, it should be clarified that both can be gradual or rapid, rapid growth does appear in nature in some species, and there are real life cases of spinal or foot expansion that are gradual rather then rapid. At best they can be diferentiated in that expansion would be something that is temporary and growth is something that is permanent, but that is not realy something that is taggable under TWYS.