So-so and Workaday

So-so adjective - Of average to below average quality.

Workaday and so-so are semantically related in mediocre topic. In some cases you can use "Workaday" instead an adjective phrase "So-so".

Workaday adjective - Being of the type that is encountered in the normal course of events.

So-so and workaday are semantically related in common topic. Sometimes you can use "So-so" instead an adjective "Workaday", if it concerns topics such as average.