Similar words
búsqueda
búsqueda is the more common, standard word; busca is slightly more informal, also used in "en busca de," in search of — both mean "search."
Similar in other languages
Portuguese
busca
busca is the Portuguese word for the same thing — both mean "search."
Practice
1 What does busca mean?
search
2 Fill the gap: Salió en ___ de trabajo.
Full sentence: Salió en busca de trabajo. (He went out looking for work.)
3 Which fingerprint chart matches busca?
busca: neutral register, common frequency, general domain, neutral connotation.