Greybeard and Uncle

Greybeard noun - A man who is very old.

Uncle and greybeard are semantically related. In some cases you can use "Uncle" instead a noun "Greybeard".

Uncle noun - The brother of your father or mother; the husband of your aunt.

Greybeard and uncle are semantically related. You can use "Greybeard" instead a noun "Uncle".