The antonyms for the word "poormouthing" are "boasting," "complimenting," "flattering," "praising," "applauding," and "commendation." Boasting means to brag or assert oneself. Complimenting means to express admiration or respect. Flattering means to praise, but insincerely. Praising means to express admiration or reverence genuinely. Applauding means to express approval or praise by clapping hands. Commendation means being praised or complimented, usually for doing something well. These antonyms perfectly describe the opposite of poormouthing, which means making critical or negative comments about oneself or one's situation to elicit sympathy or attention.