Sideboard and Salad bar

Sideboard noun - A storage case typically having doors and shelves.

Salad bar and sideboard are semantically related In some cases you can use "Salad bar" instead a noun "Sideboard".

Salad bar noun - A bar where diners can assemble a salad to their own taste.

Sideboard and salad bar are semantically related in meal set out on table for choosing topic. You can use "Sideboard" instead a noun phrase "Salad bar".