Homoglyph

A homoglyph (from Ancient Greek homos, “same,” and glyphē, “carving” or “written mark”) is a typographic character that looks identical or nearly identical to another character despite having a different identity or meaning. For example, the uppercase letter O and the digit 0 can be easily confused. Homoglyphs are especially common across different writing systems.

The Latin capital H, the Cyrillic capital Н (en), and the Greek capital Η (eta) are difficult to distinguish visually and appear identical in many fonts. The Cherokee syllabary also contains many characters that resemble letters from other writing systems; according to the most widely accepted account, its creator borrowed some of their visual forms while assigning them entirely different sounds.

The term homoglyph is contrasted with synoglyph.