You hear a gurgling in your bathroom tub when the washing machine drains or other toilet flushes?
I had this happen to me then eventually my toilet started overflowing the contents of my septic tank. SUCH FUN TO CLEAN! If you on a septic tank and this is happening you may need to have it pumped or have your drain line checked. what happened to me was my drain line was pinched and couldn't disperse my gray water, so my septic filled way too fast and eventually burped. I now use RidX once a month and it keeps the gurgles at bay.
If you are not on a septic system, CALL A PLUMBER ASAP, it could be a back up but having the sewer come back in on you would likely be way worse!
This is most likely caused by a lack of venting on either your washing machine drain or sink. The gurgling noise you hear is actually air getting drawn through the water in the sinks trap as the washing machine water drains past the sink drain. Both the sink and washing machine should be checked for venting issues by a licensed plumber.
Yes, washing machine is a common noun, a word for any washing machine; a singular, concrete, compound noun, a word for a thing. A proper noun is the name of a person, place, or thing. Washing machines seldom have names. However, the name of the company who makes the washing machine is a proper noun; for example a Kenmore washing machine, a Hotpoint washing machine, a GE washing machine, etc.