General Synonyms:
* Particular: This is a common and straightforward synonym, emphasizing the focus on details.
* Discriminating: This suggests a high standard of judgment and selectivity.
* Meticulous: This emphasizes extreme care and precision.
* Scrupulous: This implies a strong sense of moral or ethical duty in maintaining high standards.
* Exacting: This refers to demanding perfection or high standards.
Synonyms with Negative Connotations:
* Fussy: This is a more informal term that suggests being overly picky or difficult to please.
* Picky: Similar to "fussy," this suggests being unnecessarily selective.
* Prissy: This suggests being overly concerned with appearances or social conventions.
* Squeamish: This refers to being easily disgusted or offended.
Synonyms with Specific Meanings:
* Rigorous: This suggests a strict and thorough approach, often in a scientific or academic context.
* Punctilious: This emphasizes meticulousness and adherence to rules or etiquette.
The best synonym for "fastidious" will depend on the specific context and the intended meaning.