Say one piece means to express one's opinion or view on a particular matter. There are several synonyms for this phrase, such as speak up, state, assert, declare, affirm, and announce. Using different words to convey the same meaning adds variety and interest to a conversation. For instance, instead of saying "I think we should increase our marketing budget," one can use "I firmly assert that our company needs to increase the marketing budget to attract more customers." This way, the speaker adds emphasis and conviction to their statement while also using different language. Overall, incorporating synonyms for "say one piece" in our speech helps us convey our message effectively and keeps our conversations engaging.