Food and Drink:
* Avocado: From "aguacate"
* Cacao: From "cacao"
* Chocolate: From "chocolate"
* Taco: From "taco"
* Salsa: From "salsa"
* Siesta: From "siesta"
* Tortilla: From "tortilla"
* Jalapeño: From "jalapeño"
* Fajita: From "fajita"
* Tamale: From "tamale"
Animals and Plants:
* Coati: From "coatí"
* Armadillo: From "armadillo"
* Jaguar: From "jaguar"
* Gaucho: From "gaucho"
* Mocha: From "mocha"
* Saguaro: From "sahuaro"
Places and People:
* Canyon: From "cañón"
* Rancho: From "rancho"
* Patio: From "patio"
* Plaza: From "plaza"
* Amigo: From "amigo"
* Don: From "Don"
* Senorita: From "señorita"
* Fiesta: From "fiesta"
General Vocabulary:
* Alligator: From "el lagarto"
* Bravo: From "bravo"
* Barbecue: From "barbacoa"
* Bongo: From "bongó"
* Cabana: From "cabaña"
* Guitar: From "guitarra"
* Siesta: From "siesta"
* Mosquito: From "mosquito"
* Lasso: From "lazo"
* Mañana: From "mañana"
* Rodeo: From "rodeo"
* Stampede: From "estampida"
Words used in English with a Spanish pronunciation:
* Adios: From "adiós"
* Ole: From "olé"
* Hola: From "hola"
* Hasta la vista: From "hasta la vista"
This list is just a small sampling. You can find many more Spanish loanwords in English if you look!