The expression "feathered one's nest" usually refers to someone enriching themselves, especially in an unethical or selfish way. There are various synonyms that can be used instead of this phrase. One such word is "profiteering," which means to make a profit by exploiting or taking advantage of others. Another alternative is "greed," which refers to an excessive and selfish desire for wealth and material possessions. One could also use "opportunism," which describes the practice of taking advantage of opportunities with little regard for principle or ethics. "Enrichment" can also be used to describe the act of accumulating wealth or resources, though it can carry a positive connotation that "feathering one's nest" does not.
