Haddest hunch is an expression used to describe a strong feeling or intuition about something. There are many different synonyms that can be used instead of the phrase "haddest hunch". Some examples include: gut feeling, instinct, presentiment, premonition, sixth sense, intuition, suspicion, inkling, notion, and feeling in your bones. All of these synonyms convey a similar sense of conviction or belief about a particular situation or outcome. Ultimately, the use of any of these synonyms depends on the specific context and the style of the writer or speaker. Whether it's a hunch, a gut feeling, or an instinct, it's always important to trust your intuition.