Strangely enough, the only unacceptable word that I can think of for a lady's back side in the States is "ass".....bum, butt, fanny, rear, be'hind, cheeks, are all more or less acceptable. But not ass.......in Spain you can say "cula" at the dinner table, it's sort of like "bum", but not in Mexico or Cuba. There, it's far worse than "ass", more closely related to "cunt".

Oh, and I forgot "vest". In the US, it's always vest, unless you are talking a tuxedo. Then, it is "waist-cot"--pronounced waste-kot......never weskit. When I say "weskit" I get a lot of strange looks. Ladies never wear waistcots/weskits, they are always vests......

and, the British system of numbering floors has always made more sense to me. Why can't we just all call the ground floor the Ground Floor, and the first floor above that the First Floor? More and more elevators (lifts) are offering "G" instead of "1" as a choice.......therefore, "1" is the first floor above "G" or Ground Level.......same for basements.......1BG (or 1B, 2SB) meaning Below Ground or SubBasement.......

Is an "attic" always the very top (usually unfinished/uninsulated) floor? What about garret?