There are several synonyms for the phrase "buy stocks." One commonly used synonym is "invest in shares." This phrase implies a long-term investment strategy in which a person buys shares of a company in order to generate returns over time. Another similar phrase is "purchase equity," which is more technical in nature and commonly used in financial contexts. In addition, "take a position in a stock" refers to the act of buying shares in a specific company, while "acquire ownership stake" focuses on gaining ownership in a business. Finally, the more informal phrase "get into the market" refers to someone starting to buy and sell various stocks.