I asked a question about the terminology in animal models of disease, and had lots of trouble finding tags. There were computational-models and mathematical-models, but no disease-models or animal-models or translational-models or preclinical-models or animal-lines or cell-lines. I think that the site can use at least one of my "models" suggestion, and I would leave it to the community here to decide which one is best.
Second, I used the tag research mostly out of desperation, but I don't think it is a very good tag. It is a word which can be understood very differently in different contexts, and in my experience, this makes it a bad tag. I used it because preclinical models are a tool in biology research. But the only other question which uses it is about the daily academic life of a biology scientist, which is a different use. I also anticipate that it will someday be used in non-constructive ways: somebody can construe it as to be used when a question asks "is there research on the topic I want to ask about", which is probably true of most questions on the site. Another problem would if a user thinks "I am doing research (= seeking more information) on X, so I will tag my question with X and research" - this certainly covers 100% of the question on the site and completely defeats the purpose of the tag.