Similar words
tinieblas
tinieblas is more literary or biblical, an ominous deep darkness; oscuridad is the everyday word for "darkness."
Similar in other languages
German
Dunkelheit
Dunkelheit is the German word for the same thing — both mean "darkness."
Portuguese
escuridão
escuridão is the Portuguese word for the same thing — both mean "darkness."
Practice
1 What does oscuridad mean?
darkness
2 Fill the gap: Tengo miedo a la ___.
Full sentence: Tengo miedo a la oscuridad. (I'm afraid of the dark.)
3 Which fingerprint chart matches oscuridad?
oscuridad: neutral register, common frequency, general domain, neutral connotation.