Force constant and surface tension have the same dimensions in

Dimensional formula of force constant: $\left[\mathrm{k}\right]=\left[{\mathrm{MT}}^{-2}\right]$

Dimensional formula of surface tension:  $\left[\mathrm{S}\right]=\left[{\mathrm{MT}}^{-2}\right]$

Hence, both have same dimensions in mass, length and time.