Similar words
bulbo
bombilla and bulbo are close synonyms for "bulb"; bulbo is more general, and can also mean a plant bulb, like a tulip bulb.
Similar in other languages
German
Glühbirne
Glühbirne is the German word for the same thing — both mean "light bulb."
Portuguese
lâmpada
lâmpada is the Portuguese word for the same thing — both mean "light bulb."
Practice
1 What does bombilla mean?
light bulb
2 Fill the gap: Cambié la ___ del salón.
Full sentence: Cambié la bombilla del salón. (I changed the living-room light bulb.)
3 Which fingerprint chart matches bombilla?
bombilla: neutral register, common frequency, general domain, neutral connotation.