The crossword solution for the term 'burger alternatives' is tacos, which is a five-letter word. Tacos are a traditional Mexican dish consisting of a corn or wheat tortilla filled with various ingredients such as meat, cheese, beans, lettuce, tomatoes, and salsa. They are often served with sides such as guacamole, sour cream, and hot sauce. Tacos are a popular alternative to burgers and can be found in many restaurants and fast food establishments.