Insolate is a verb that means to expose something to the sun's rays. If you are looking for synonyms to use in your writing to avoid repetition, there are several options available. You could use words like sunbathe or bask as they give meaning similar to insolate, but with a more specified usage. Tanning or getting a tan could also be considered as synonyms as they imply a specific result of the exposure. Alternatively, you could use more general words like expose, heat or irradiate to convey the act of being exposed to the sun's rays rather than the inherent purpose or result. Ultimately, the choice of synonym will depend on the tone and context of your writing.