"Anal-retentive" is a slang term often used to describe someone who is excessively meticulous, detail-oriented, or excessively focused on rules and order. While the term can be derogatory, there are synonyms that can be used to convey similar meanings without being offensive. These include "fastidious," which implies being excessively attentive or particular about details. Another option is "meticulous," signifying great attention to detail and precision. "Rigid" can be used to describe someone who is inflexible or strict about adherence to rules. Lastly, "perfectionistic" captures the idea of someone who constantly seeks perfection and may be highly critical of minor mistakes. It is important to consider the context and tone when choosing an alternative to "anal-retentive."