There are many synonyms for the phrase "decent salary". Some commonly used ones are "competitive pay", "fair compensation", "adequate income", "reasonable remuneration", and "satisfactory wages". Other options could include "livable wage", "appropriate salary", "justifiable earnings" or "commensurate pay". Ultimately, the exact phrasing will depend on the context and the specific connotations that the speaker wants to convey. Regardless of the terminology employed, the underlying idea is that someone is being paid a rate that is sufficient to afford a reasonable standard of living and meet their basic needs.