Similar words
escarcha
helada specifically means a "frost" as a weather event, a freeze; escarcha is the physical frost that forms on surfaces, the visible ice crystals.
Similar in other languages
French
gel
gel is the French word for the same thing — both mean "frost."
French
givre
givre is the French word for the same thing — both mean "frost."
Portuguese
geada
geada is the Portuguese word for the same thing — both mean "frost."
Practice
1 What does helada mean?
frost
2 Fill the gap: Hubo ___ anoche.
Full sentence: Hubo helada anoche. (There was frost last night.)
3 Which fingerprint chart matches helada?
helada: neutral register, common frequency, general domain, neutral connotation.