Similar words
orçar
orçar is more specifically financial, to budget or quote a price; estimar is more general, to estimate a quantity, value, or guess.
Similar in other languages
French
estimer
estimer is the French word for the same thing — both mean "to estimate."
Practice
1 What does estimar mean?
to estimate
2 Fill the gap: ___ cem pessoas.
Full sentence: Estimo cem pessoas. (I estimate a hundred people.)
3 Which fingerprint chart matches estimar?
estimar: neutral register, common frequency, general domain, neutral connotation.