Steganography is using cryptography to hide data in other data (eg in images etc.)[1]
Stenography is shorthand and crazy fast typing using a special keyboard and that stuff. It means shortening language using phonemes and the like.[2]
[1] https://www.freecodecamp.org/news/what-is-steganography-hide...
[2] https://stenoguru.com/what-is-the-stenography-and-how-can-i-...
