It is not clear if you are asking for words in native American languages or English words referring to native American culture. In native languages there are hundreds of thousands of words starting with the vowel u (or oo); here are a few from the Natick language spoken by the Massachusetts, Narragansett and Wampanoag tribes and their neighbours:
uhquan..................fishhook
ukquttunk..............his throat
ummisses...............his/her sister
unnag.....................if it is so, may it be so, if it is possible
unnonat..................to say, tell
uppeshau................a flower
uspuhhoo.................to run and hide
ussowenonat...........to call by a name, to give a name to
ut..............................in, at, by (particle or suffix; ut sepu-ut = by the river)
uttiyeu.......................which?
it is if u come from only native americans
Unite/Unitedundergarmentsuicongunited
Hey i just met u and this is crazy, but here's the native american's number so call me maybe?
how should i know i am asking u
Us, umbrella, under, uncle, uranus, up.
unto these hills. unity. uprooted.
find a native american friend and get her to inroduce u to her native american boy friends and BAM! u can thanks me l8er
what is a native american ox u ask it is a donkey
Some words that start with U are:uglyulcerumbrellaumpireuncleunderunguentupurbanurchinurgenturnuseutility
Words that Start with the Letter "U"umbrellaunderundergroundunderstandunicycleunimaginableunitedunlockunusualupdateuseusher
Some words that start with U in the American Revolution are: ugly, ultimatum, umbrage, uneasy, unexpected, unhappy, uniform, unify, union, unite, unruly, upheaval, uproar, upset, urgent, us, usurp, utmost
Some Scrabble words that start with U are:upususeunderuncleurineuntoundounclearunnecessaryumbrellaurgentuglyusefulumberutilityunusualunguentuniversalupperundulyundecidedutmostunitunmanageable
there are hundreds of different Native American languages and dialects. in Osage it is U-xta
Words that start with the letter "U"UtilityUtilizeUglyUseunionUmbrellaUniqueUtensilsUndergoUniversity
no Columbus was not the first American havent u heard of the native Americans?
Some four letter words that start with U are:uglyulnaundountouponureaurgeused
Some words that start with a short U sound are umbrella, up, under, and umpire.