All of the following are listed in Chambers Dictionary...uakari (monkey), umbrella ant, umbrella bird, umbrette (stork), unau (sloth), urchin (sea-), urial (sheep), urson (porcupine), urubu (vulture), urva (mongoose). Ukulele is the name of a musical instrument in English, but the word comes from the Hawaiian for �flea'...and there is always the wonderful, mythical unicorn.
Dear Vittoria, 'upupa' is the Latin name for the bird now more or less universally called the 'hoopoe'. Nevertheless, I shall certainly add it to my list for the next time this question appears! Cheers