10 out of ten, but I cheated by having degrees in Spanish/Castellano
A palabra aguda is a word that ends in a stressed syllable: verdad, miró. Words that end in any consonant except n or s are agudas unless they have a written accent.
A palabra grave is a word stressed on the next to last (penúltimo) syllable. Words that end in aeiou, n or s are palabras graves, unless they have a written accent.
A palabra esdrújula is a word that is stressed on the next to the next to the last (antepenútimo) syllable esdrújula is a palabra esdrújula, so are Álvaro and Urchusuástegui. A sobreesdrújula word is a word stressed on the the next to the next to the next to the last syllable. Apágamelo, cándidamente. These words are rare and usually compound words. You can find more examples by googling the term.
Syllables are always counted from the end in Spanish. In English, we count from the start of the word.