  The first measurements of anisotropic flow coefficients $v_{\rm{n}}$ for
mid-rapidity charged particles in Xe-Xe collisions at $\sqrt{s_{\rm{NN}}} =
5.44$ TeV are presented. Comparing these measurements to those from Pb-Pb
collisions at $\sqrt{s_{\rm{NN}}} = 5.02$ TeV, $v_{2}$ is found to be
suppressed for mid-central collisions at the same centrality, and enhanced for
central collisions. The values of $v_{3}$ are generally larger in Xe-Xe than in
Pb-Pb at a given centrality. These observations are consistent with
expectations from hydrodynamic predictions. When both $v_{2}$ and $v_{3}$ are
divided by their corresponding eccentricities for a variety of initial state
models, they generally scale with transverse density when comparing Xe-Xe and
Pb-Pb, with some deviations observed in central Xe-Xe and Pb-Pb collisions.
These results assist in placing strong constraints on both the initial state
geometry and medium response for relativistic heavy-ion collisions.
