The term 'discussed at length' can be expressed in three different ways: belabored (9 letters), dwelt upon (9 letters), and hashed over (10 letters). Belaboring means to labor or work hard on something, while dwelt upon implies a longer, more detailed discussion. Hashed over is a phrase that suggests a thorough examination of a topic, often with multiple people involved. All three terms imply a lengthy conversation or debate about a particular subject.