\usepackage {graphicx}
\HR\begin{tabular}{@{}lll@{}}
  K\"oln & Lyon    & Oxford \\
 Rhein   & Rh\^one & Thames
 \end{tabular}\HR\par\bigskip
\HR\resizebox{2cm}{.5cm}{%
 \begin{tabular}{@{}lll@{}}
   K\"oln & Lyon    & Oxford \\
   Rhein  & Rh\^one & Thames
 \end{tabular}}\HR
