Blah and Ho hum

Blah noun - Language, behavior, or ideas that are absurd and contrary to good sense.

Ho hum and blah are semantically related In some cases you can use "Ho hum" instead an adjective "Blah".

Blah and ho hum are semantically related in gentle topic. Sometimes you can use "Blah" instead an adjective phrase "Ho hum", if it concerns topics such as dull, tasteless, commonplace, unimaginative.