unworthy, a. unmeritorious, [undeserving], [despicable], [contemptible].
unwritten, a. traditional.
unyielding, a. [inflexible], [stiff], [unbending], incompliant, indomitable, insubmissive, [tenacious], [unimpressible], impliable, obdurate, intractable, [game], [resolute].
upbraid, v. [reproach], [scold], [chide], [rate], [reprove], reprimand, [twit].
upbraiding, n. [scolding], [reproach], reprimand, [censure], reprehension.
up grade. [ascent], acclivity.
uphill, a. ascending, acclivous, [rising].
uphold, v. [support], sustain, [vindicate], [defend].
upkeep, n. [maintenance].
upper, n. vamp (of a shoe).