Similar words
capacete
capacete is the modern everyday word, like a motorcycle or bike helmet; elmo is more historical or literary, like a knight's helmet.
Similar in other languages
German
Helm
Helm is the German word for the same thing — both mean "helmet."
Spanish
casco
casco is the Spanish word for the same thing — both mean "helmet."
Spanish
yelmo
yelmo is the Spanish word for the same thing — both mean "helmet."
Practice
1 What does elmo mean?
helmet
2 Fill the gap: O cavaleiro usava um ___.
Full sentence: O cavaleiro usava um elmo. (The knight wore a helm.)
3 Which fingerprint chart matches elmo?
elmo: neutral register, academic frequency, general domain, neutral connotation.