Vibraphone and Xylophone

Vibraphone noun - A percussion instrument similar to a xylophone but having metal bars and rotating disks in the resonators that produce a vibrato sound.

Xylophone and vibraphone are semantically related In some cases you can replace term "Xylophone" with "Vibraphone", this nouns are similar.

Xylophone noun - A percussion instrument with wooden bars tuned to produce a chromatic scale and with resonators; played with small mallets.

Vibraphone and xylophone are semantically related in instrument topic. You can use "Vibraphone" instead a noun "Xylophone".