The word "non-coherent" refers to something that lacks unity or organization. Synonyms for this word include disjointed, disconnected, disorganized, incoherent, and unconnected. These words suggest a lack of unity or cohesion, which can make communication or action difficult or incomplete. Other synonyms include confused, jumbled, and rambling, which imply a state of chaos or disorder. In technical contexts, "non-coherent" can refer to light waves that have no fixed relationship with each other, and thus cannot form a stable interference pattern. Synonyms in this context include inharmonious, irregular, and unstable. Regardless of the context, synonyms for "non-coherent" suggest a state of disarray or disconnection.