$\begin{array}{rl}\text{uacgr}& \mathrm{\&uacgr;}\\ \text{Uacgr}& \mathrm{\&Uacgr;}\\ \text{uacute}& ú\\ \text{Uacute}& Ú\\ \text{uarr}& \uparrow \\ \text{uArr}& \Uparrow \\ \text{Uarr}& ↟\\ \text{uarr2}& \&uarr2;\\ \text{Uarrocir}& ⥉\\ \text{ubrcy}& ў\\ \text{Ubrcy}& Ў\\ \text{ubreve}& ŭ\\ \text{Ubreve}& Ŭ\\ \text{ucirc}& û\\ \text{Ucirc}& Û\\ \text{ucy}& у\\ \text{Ucy}& У\\ \text{udarr}& ⇅\\ \text{udblac}& ű\\ \text{Udblac}& Ű\\ \text{udhar}& ⥮\\ \text{udiagr}& \mathrm{\&udiagr;}\\ \text{udigr}& \mathrm{\&udigr;}\\ \text{Udigr}& \mathrm{\&Udigr;}\\ \text{ufisht}& ⥾\\ \text{ufr}& 𝔲\\ \text{Ufr}& 𝔘\\ \text{ugr}& \mathrm{\&ugr;}\\ \text{Ugr}& \mathrm{\&Ugr;}\\ \text{ugrave}& ù\\ \text{Ugrave}& Ù\\ \text{uHar}& ⥣\\ \text{uharl}& \upharpoonleft \\ \text{uharr}& \upharpoonright \\ \text{uhblk}& ▀\\ \text{ulcorn}& ⌜\\ \text{ulcorner}& ⌜\\ \text{ulcrop}& ⌏\\ \text{ultri}& ◸\\ \text{umacr}& ū\\ \text{Umacr}& Ū\\ \text{uml}& ¨\\ \text{UnderBar}& \_\\ \text{UnderBrace}& ⏟\\ \text{UnderBracket}& ⎵\\ \text{UnderParenthesis}& ⏝\\ \text{Union}& \bigcup \\ \text{UnionPlus}& \uplus \\ \text{uogon}& ų\\ \text{Uogon}& Ų\\ \text{uopf}& 𝕦\\ \text{Uopf}& 𝕌\\ \text{uparrow}& \uparrow \\ \text{Uparrow}& \Uparrow \\ \text{UpArrow}& \uparrow \\ \text{UpArrowBar}& ⤒\\ \text{UpArrowDownArrow}& ⇅\\ \text{updownarrow}& \updownarrow \\ \text{Updownarrow}& \Updownarrow \\ \text{UpDownArrow}& \updownarrow \\ \text{UpEquilibrium}& ⥮\\ \text{upharpoonleft}& \upharpoonleft \\ \text{upharpoonright}& \upharpoonright \\ \text{uplus}& \uplus \\ \text{UpperLeftArrow}& \nwarrow \\ \text{UpperRightArrow}& \nearrow \\ \text{upsi}& \upsilon \\ \text{Upsi}& \Upsilon \\ \text{Upsih}& \mathrm{\&Upsih;}\\ \text{upsilon}& \upsilon \\ \text{Upsilon}& {\rm Y}\\ \text{Upsilon}& {\rm Y}\\ \text{UpTee}& \perp \\ \text{UpTeeArrow}& ↥\\ \text{upuparrows}& \upuparrows \\ \text{urcorn}& ⌝\\ \text{urcorner}& ⌝\\ \text{urcrop}& ⌎\\ \text{uring}& ů\\ \text{Uring}& Ů\\ \text{urtri}& ◹\\ \text{uscr}& 𝓊\\ \text{Uscr}& 𝒰\\ \text{utdot}& ⋰\\ \text{utilde}& ũ\\ \text{Utilde}& Ũ\\ \text{utri}& ▵\\ \text{utrif}& ▴\\ \text{uuarr}& \upuparrows \\ \text{uuml}& ü\\ \text{Uuml}& Ü\\ \text{uwangle}& ⦧\end{array}$