Synonyms for interest

noun

1. Concern

   attention, curiosity, engagement, excitement; see attention 1, 2, care 2, curiosity 1, enthusiasm 1.

2. Advantage

   profit, benefit, gain; see advantage 3.

3. Premium

   credit, due, discount, percentage, gain, bonus, earnings, accrual, dividend, yield; see also addition 2, profit 2.

4. Share

   stake, piece, title, investment; see credit 2, share.

5. Affair

   concern, matter, business, case; see affair 1.

6. Importance

   consequence, concern, moment; see importance 1.

7. Something that engages the attention

   pursuit, preoccupation, pastime; see hobby.

8. Persons with a common trade or purpose; often plural

   class, powers, business interests; see industry 3.

in the interest(s) of

verb