* Connotation: Synonyms can have different emotional associations or implications. For example, "cheap" and "affordable" both refer to low price, but "cheap" often carries a negative connotation of low quality, while "affordable" implies value for money.
* Formal vs. informal: Some synonyms are more formal or informal than others. For example, "happy" is more informal than "joyful."
* Register: Some synonyms are appropriate for certain situations or contexts, but not others. For example, "deceased" is more formal than "dead."
* Nuance: Synonyms can emphasize different aspects of the same concept. For example, "big" and "large" both refer to size, but "big" can also suggest importance or significance.
Therefore, choosing the right synonym depends on the context and the desired effect. A good thesaurus can help you find the most appropriate synonym for your needs.