Similar words
tajada
rodaja specifically means a round slice, like a lemon slice; tajada is more general, a slice of any shape.
Similar in other languages
Portuguese
fatia
fatia is the Portuguese word for the same thing — both mean "slice."
Practice
1 What does rodaja mean?
slice
2 Fill the gap: Corta una ___.
Full sentence: Corta una rodaja. (Cut a slice.)
3 Which fingerprint chart matches rodaja?
rodaja: neutral register, common frequency, general domain, neutral connotation.