interchange, change over, swap, change, replacement, substitution, turn around, exchange, trade, alternate, more...

remain, stay, persist, continue, keep

toggle switch, rocker switch, push button switch, slide switch, rotary switch, dip switch, membrane switch, limit switch, proximity switch, more...

light, main, off, pole, electric, single, electronic, automatic, rotary, way, open

nintendo console,   flip option,   change topic,   button on a blender,   change abruptly,   on off,   telephone button,   change lines,   switching positions,   to change subject,   to trade places