A bind rune, or bindrune, is a Migration Period Germanic ligature of two or more runes. They are extremely rare in Viking Age inscriptions, but are common in earlier and later inscriptions.
A boat whose mast is formed with the bind runes þ=r=u=t=a=ʀ= =þ=i=a=k=n, on the runestone Sö 158 at Ärsta, Södermanland, Sweden. The bind runes tell that the deceased was a strong thegn.
Cryptic runic inscription on a silver knife mount, with several bind runes
The "Derbyshire bone plate", showing the name Hadda with ligatured double ᛞ
A bind rune for the word runaʀ on the Sønder Kirkeby Runestone in Denmark
Cipher runes, or cryptic runes, are the cryptographical replacement of the letters of the runic alphabet.
The Rök runestone, Sweden, features 'tent runes' in its uppermost row. Centered in the bottom row is a hook rune.
A page from the 18th-century manuscript by the Icelander Jón Ólafsson, which deciphered the cryptic runes for Continental Scandinavian scholars. This page shows different types.