

O rinoceronte usa o corno para defender-se.
Os cornos daquela cabra são muito compridos.
O touro da quinta tem um corno partido.
"o corno" is in the lesson "Dangerous animals" (Level 9), along with 16 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.