BUR #14381 has been rejected.
create alias waistcoat -> vest
vest status:active count: 129908
waistcoat status:active count: 4820
suit vest status:active count: 3348
waistcoat vest status:active count: 2529
These seem redundant, wikipedia claims that they're just regional names for the same article of clothing, and 69% (nice) (edit: copypasta, it's actually 52%) of waistcoats are already tagged as vests anyways. I know the topic's been brought up before, but given how relatively under-utilized the waistcoat tag is, I don't think we gain anything from keeping it separate.
Only 0.2% of waistcoat posts even had some sort of color_waistcoat tags, which is unusual for a clothing tag if it's actually being used. (edit: Since there were literally only 10 of them, I just swapped those over to the equivalent color_vest tags for discoverability.)
Updated