You can learn Spanish words through word lists on websites that teach Spanish, such as LearnSpanishToday.com, SpanishPod101.com and StudySpanish.com. You can also use an online Spanish dictionary, such as SpanishDict.com, to look up words in Spanish or English.
LearnSpanishToday.com has a word list with common vocabulary. Visit the home page, and click on Vocabulary Lists. Words are grouped into categories including sports, music, colors, relations and clothing. The website has Spanish learning software available for purchase, along with games and a pronunciation guide.
SpanishPod101.com has core word lists ranging in size from 100 to 2,000 words. A free account is required to access the word lists. More features are available by paying a fee for a premium account.
StudySpanish.com has vocabulary broken down into categories. Visit the home page, and click on Vocabulary. Multiple units, each with different word categories, are available. The website has more features available if you pay a fee, including more words in each category.
SpanishDict.com allows you to search for words in English or Spanish. The website also provides multiple Spanish translator programs, verb conjugations, flashcards, grammar practice and a forum for questions. SpanishDict.com has an application called Fluencia, a Spanish learning program. It's available on phones, tablets and computers.