Here's what rhymes with ionosphere.

Consider these alternatives

magnetosphere / will mesosphere / will thermosphere / will electromagnetic / magnetic troposphere / will oscillations / relations hydrosphere / will resistivity / activity geomagnetic / magnetic waveguide / side conductivity / activity reflectivity / activity stratosphere / will propagation / education meteorology / quality lithosphere / will permeability / stability equator / later magnetism / given atmosphere / will insolation / information ultraviolet / violet conductive / productive ions / science gravitational / educational ionizing / rising hydrology / authority