The difference between Royal and Stately

When used as adjectives, royal means of or relating to a monarch or their family, whereas stately means (of people) regal, dignified.

Royal is also noun with the meaning: a royal person.

Stately is also adverb with the meaning: in a stately manner.

check bellow for the other definitions of Royal and Stately

Royal as an adjective:

Of or relating to a monarch or their family.
Royal as an adjective:

Having the air or demeanour of a monarch.
Royal as an adjective (nautical):

In large sailing ships, of a mast right above the topgallant mast and its sails.

Examples:

"royal mast;&emsp; royal sail"
Royal as an adjective (boxing, military):

Free-for-all, especially involving multiple combatants.
Royal as an adjective (informal):

.

Examples:

"a royal pain in the neck"

Royal as a noun:

A royal person; a member of a royal family.
Royal as a noun (paper, printing):

A standard size of printing paper, measuring 25 by 20 inches.
Royal as a noun (dated):

The Australian decimal currency intended to replace the pound in 1966; was changed to "" before it was actually circulated.
Royal as a noun:

The fourth tine of an antler's beam.
Royal as a noun:

A stag with twelve points (six on each antler).
Royal as a noun (nautical, sailing):

In large sailing ships, square sail over the topgallant sail.
Royal as a noun:

An old English gold coin, the rial.
Royal as a noun (military):

A small mortar.
Royal as a noun (card games):

In auction bridge, a royal spade.

Stately as an adjective:

(of people) regal, dignified; worthy of respect.
Stately as an adjective:

(of movement) dignified; deliberate, unhurried.
Stately as an adjective:

Imposing; grand, impressive.