There are many synonyms that can be used to describe a "source of steady profit." This term refers to a dependable stream of revenue that a business or investment provides. Some possible synonyms for this phrase could include "reliable income source," "consistent revenue stream," "stable earnings generator," or "sustainable profit source." Other terms that may be used to describe these types of financial resources could include "resilient returns," "durable dividends," or "long-term gains." Ultimately, these terms all speak to the idea of a financial asset that can be counted on to provide ongoing, predictable returns over an extended period of time.