All tags involving 2 words are spelled with an dash between both words (e.g. aviation-history). The tag mechanicalengineering does not follow this convention. Should we rename it? if so, how? (I fail to create the tag with a dash because it is too close to the other one)
I have un-tagged both questions which had that tag, it added nothing over the tags that were already present and I agree it was named incorrectly.
Now no questions are tagged it shall hopefully die out. If it doesn't I'd suggest it is just a synonym of engineering