I propose to rename the tag burn-fat to fatburning it just sounds odd to me.
I am not sure if there are any naming rules for verbs on StackExchange sites, but it would come in line with tags like weightlifting, actually most taggified verbs I have seen on SE site are in the ~ing form to make them (sound like) a noun. I have never seen the neutral to ~ form before.
gerund. :P I don't think that weight-loss is a good substitute as there are some questions (example) that don't aim to lose weight but just reduce the body fat percentage. – Informaficker Oct 1 '12 at 20:54