Similar words
signo
letrero specifically means a physical sign or placard; signo is the general word for "sign," a symbol, indication, or zodiac sign.
Similar in other languages
Portuguese
letreiro
letreiro is the Portuguese word for the same thing — both mean "sign."
Practice
1 What does letrero mean?
sign
2 Fill the gap: Lee el ___.
Full sentence: Lee el letrero. (Read the sign.)
3 Which fingerprint chart matches letrero?
letrero: neutral register, common frequency, general domain, neutral connotation.