These look alike in Spanish because "acorde" (chord) is embedded in "acordeón" (accordion), but they're unrelated in English: a chord is a set of musical notes played together, an accordion is an instrument.
Práctica
1 ¿Qué significa chord?
acorde
2 Completa el espacio en blanco: The guitarist plays a simple ___.
Oración completa: The guitarist plays a simple chord. (El guitarrista toca un acorde simple.)
3 ¿Qué gráfico de características corresponde a chord?
chord: registro neutral, frecuencia común, dominio general, connotación neutral.