u 
ubicar 
último(a)
un solo color
único(a)
unidad (f)
uniforme (m) 
unir
universidad (f)
uña (f)
uruguayo(a)
usar
uso (m) 
usted (Ud.)
ustedes (Uds.)
usurpar
utilizar
uva (f)

or
to locate, situate
last
solid color
only
unit
uniform
to connect, unite, join, bind, attach, couple
university
fingernail
Uruguyan
to use
use
you (formal)
you (plural, formal)
to usurp
to utilize
grape