So-so and White-bread

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

White-bread and so-so are semantically related In some cases you can use "White-bread" instead an adjective phrase "So-so".

White-bread adjective - Of or belonging to or representative of the white middle class.

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