"Dime a dozen" is a common idiom that refers to things or people that are extremely common, ordinary or easily available. There are various synonyms that convey the same meaning, including ubiquitous, commonplace, plentiful, abundant, and numerous. Other synonyms can include prolific, prevalent, rampant, and widespread. When describing something or someone as "dime a dozen," it typically implies that they lack uniqueness or distinction and may be easily replaced with something of equal value. The phrase "dime a dozen" is often used in negative contexts to convey a sense of disappointment or disapproval. Overall, these synonyms capture the essence of the phrase and help convey the message of commonness and availability.