Words That are Not the International Radiotelephony Spelling Alphabet Code for U

• Umbrella
• Uvula
• Underpants
• Uppercut
• Utah
• Universe
• Unladylike

So my father was in the army, and when he spells things out, he always uses the Alpha, Bravo &c system. It has been a life long, albeit, entirely unsuccessful, goal of mine to learn it. Yesterday evening, as I was walking home from work, I was almost all the way there, and I got stuck on U. I'll look it up when I finish typing this sentence, but you can be assured that it isn't any of those...

And the winner is...

Uniform