Humdrum and Same old thing

Humdrum noun - A tedious lack of variety.

Same old thing and humdrum are semantically related In some cases you can use "Same old thing" instead a noun "Humdrum".

Humdrum and same old thing are semantically related in monotony topic. Sometimes you can use "Humdrum" instead a noun phrase "Same old thing", if it concerns topics such as boredom.