Ho hum and Unoriginal

Unoriginal and ho hum are semantically related. in dull topic. In some cases you can use "Unoriginal" instead an adjective phrase "Ho hum", when it comes to topics like commonplace.

Unoriginal adjective - Using or marked by the use of something else as a basis or model.

Ho hum and unoriginal are semantically related. Sometimes you can use "Ho hum" instead an adjective "Unoriginal".