Marker

marcador

(someone or something that marks (including: one who keeps account of a game played; a counter used in games; the soldier who marks the direction of an alignment; an attachment to a sewing machine for marking a line on the fabric by creasing it; a person who assesses the standard of a student in a test or examination))

marcador

(a device that fires a paintball)

marcador

(a gene or DNA sequence with a known location)

marco

(object used to mark location)