The phrase "have had enough" can be replaced by several synonyms to express the same sentiment. Some alternatives include "fed up," "tired of," "sick of," "had it with," and "bored with." These terms are often used interchangeably in everyday conversations to convey a sense of frustration or dissatisfaction with a particular situation or person. Whether you are feeling overwhelmed by work, annoyed with someone's behavior, or simply bored with a routine, using a synonym for "have had enough" can help you express your feelings more precisely and effectively.