Ok me and Mrb are in an ongoing disagreement re baby clothes
in my opinion:
Clothes with long arms and closed in feet = sleepsuits
clothes with no legs and short sleeves that do up between legs - vests
clothes with short sleeves and short legs = rompers
clothes with long sleeves and no legs the do up in between legs = baby grows
we called the short sleeved, no legged, poppers underneath things - bodysuits. and the ones with the long sleeves were long sleeved bodysuits. Vests stop at the waist.