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