Mellifluous and Smooth-spoken

Mellifluous adjective - Having a pleasantly flowing quality suggestive of music.

Smooth-spoken and mellifluous are semantically related In some cases you can use "Smooth-spoken" instead an adjective "Mellifluous".

Smooth-spoken adjective - Expressing yourself readily, clearly, effectively.

Mellifluous and smooth-spoken are semantically related in articulate topic. Sometimes you can use "Mellifluous" instead an adjective phrase "Smooth-spoken".