fa-tripadvisor icon in font awesome icons is part of brand (fab) icons
fa-truck-loading icon in font awesome icons has 1 variant fas i.e.,solid.
fa-tshirt icon in font awesome icons has 1 variant fas i.e.,solid.
fa-tumblr-square icon in font awesome icons is part of brand (fab) icons
fa-twitter-square icon in font awesome icons is part of brand (fab) icons
fa-undo icon in font awesome icons has 1 variant fas i.e.,solid.
fa-undo-alt icon in font awesome icons has 1 variant fas i.e.,solid.
fa-university icon in font awesome icons has 1 variant fas i.e.,solid.
fa-unlink icon in font awesome icons has 1 variant fas i.e.,solid.
fa-unlock-alt icon in font awesome icons has 1 variant fas i.e.,solid.