In Spanish, all nouns have a masculine or a feminine gender. For example, la casa is feminine el gato is masculine. It is very important to know nouns gender, so we know what gender the adjectives should have, articles … that accompany that noun. But… how can you know the words gender? Normally masculine nouns end in -o and feminine nouns in -a, although it is not always so simple. There are some rules, but also exceptions. Take a look at the following infographic to understand it better.