Formal:
* Suggest: This is a neutral synonym, implying simply a suggestion.
* Propose: Similar to "suggest," but often carries a more formal tone, implying a structured proposal.
* Advocate: This suggests a stronger support for something, often based on your expertise.
* Endorse: This signifies a formal approval or support.
* Commend: This focuses on praising and highlighting the positive aspects of something.
* Urge: This implies a strong encouragement or request.
Informal:
* Suggest: (See above)
* Tip: This implies a friendly piece of advice, often for something specific.
* Advise: This implies giving guidance or direction.
* Praise: This focuses on positive aspects and encourages the subject.
* Push: This suggests a strong encouragement, perhaps even a nudge.
* Back: This implies support for a specific course of action.
Other:
* Nominate: This suggests putting forward a person or thing for consideration.
* Prescribe: This is used when suggesting a specific course of action, often in a medical context.
* Indicate: This suggests pointing to something as a good choice.
The best synonym for "recommend" will depend on the specific context and the desired tone.