Soulos is a word with primarily historical and literary significance. It is a variant spelling of "solace," meaning comfort or consolation in a time of distress or sadness. While not entirely obsolete, the "soulos" spelling is considerably less common in modern English usage compared to "solace."
The etymology traces back to the Latin word "solacium," from which the Old French "solaz" and Middle English "solas" are derived. "Soulos" represents an alternative, somewhat archaic, path of evolution from these roots. Its occurrence is mainly found in older texts and poetic works, often employed for stylistic effect or to evoke a sense of antiquity.
The meaning of Soulos aligns directly with that of Solace. To offer Soulos is to provide comfort and support. To find Soulos is to discover relief from grief, suffering, or anxiety. The distinction lies solely in the spelling and the contexts in which it's generally encountered. Its infrequent use suggests a preference for the more widely recognized and accessible "solace" in contemporary writing and conversation.