Similar words
carnet
cahier is more for a school exercise book; carnet is more for a small personal notebook or pad — both mean "notebook."
Similar in other languages
Portuguese
caderneta
caderneta is the Portuguese word for the same thing — both mean "notebook."
Portuguese
caderno
caderno is the Portuguese word for the same thing — both mean "notebook."
Practice
1 What does cahier mean?
notebook
2 Fill the gap: L'élève écrit dans son ___.
Full sentence: L'élève écrit dans son cahier. (The student writes in his notebook.)
3 Which fingerprint chart matches cahier?
cahier: neutral register, core frequency, general domain, neutral connotation.