The phrase "in lonely pride" can evoke a sense of isolation and self-sufficiency, which can be conveyed through various synonyms. "Solitary dignity" can capture the same tone, emphasizing a steadfast independence and self-respect. "Unconquerable self-reliance" adds a touch of resilience to the mix, highlighting the ability to withstand hardship with grace. "Lone fortitude" puts a structural spin on the concept, likening the individual to a sturdy fortress. "Singular self-assurance" speaks to an unshakable confidence, born out of a solitary yet powerful sense of self. Overall, these synonyms complement the original phrase, painting a picture of strength and resilience in the face of solitude.