General Terms:
* Sycophant: This is a classic synonym for a servile flatterer, often used in a disapproving way.
* Toady: Similar to sycophant, this word implies a more obsequious and fawning type of flatterer.
* Yes-man: This term emphasizes the willingness to agree with someone, even if they don't truly believe it.
* Brown-noser: This is a slang term for a person who tries to ingratiate themselves with someone by flattering them.
More Specific Terms:
* Bootlicker: This is a more derogatory term for someone who is excessively servile.
* Flatterer: This is a more neutral term for someone who praises others, but it can also be used in a negative way to suggest insincerity.
* Courtier: This term suggests a person who is skilled at flattering and pleasing powerful people.
* Fawner: This word emphasizes the act of flattering someone in a way that is considered overly eager or servile.
* Parasitic: This suggests that the flatterer is using the person they are flattering for their own benefit.
The best word to use will depend on the specific context and the tone you want to convey.