ta-ta/ˌtah ʹtah, taʹtah/ interj

• up to one's (old) tricks (again)
• up top
• up to scratch
• up to snuff
• up to speed
• up to the elbows in/with
• up to the mark
• up-to-the-minute
• uptown
• upturn
• UPU
• UPVC
• upward
• upwardly mobile
• upward mobility
• upwards
• upwards/upward of
• upwind
• up with
• up yours
• Ur-
• ur-
• uracil
• uraei
• uraemia