Definitions:

1. Implies that something is capable of producing a gain or profit, whether in terms of financial earnings, personal benefits, or other advantageous outcomes. NOUN
   • The government's policies prioritize the gainfulness of employment for citizens.
2. Is the condition of resulting in or providing advantage, success, or profit. NOUN
   • She evaluated the gainfulness of each job offer before making her final decision.
3. Refers to the quality or state of being productive, profitable, or beneficial. NOUN
   • The gainfulness of the new business venture was evident from the increasing profits and expanding customer base.
4. Refers to the quality or state of being profitable, advantageous, or beneficial. NOUN
   • The project's gainfulness was questioned when the costs began to exceed the expected benefits.

Synonyms:

• advantageousness
• benefit
• lucrativeness
• productiveness
• profitability
• usefulness