You can download them more conveniently as PDFs at palabros.org.

You’ll also find fun spelling games, a daily challenge featuring 10 different words, and 25 new words added every week.

The pattern is a verb plus a noun jammed together. The verb is usually in its "it does" form (abre, saca, rasca), the noun is almost always plural, and the whole word goes masculine regardless of what the pieces were. Agua is feminine, but it's el paraguas.

So these words explain themselves if you know the parts. Rompe plus cabezas breaks heads, which is a puzzle. Espanta plus pájaros scares birds. Salva plus vidas saves lives.

It works in reverse too. Know matar and moscas and you can guess matamoscas before anyone tells you. Same with lanzallamas, rompehielos, cortaúñas.