Double kitchen sink has a foul odor coming from it drains slow and tends to be worse when washing machine is used i have tried bleach and enzyme cleaners any suggestions?
It certainly sounds like it is not draining properly. If it has always been this way, then you could guess that the original plumbing/piping design is faulty. However, if this problem has been getting worse over time, you'll need to call in a plumber. There may be a blockage somewhere along the line, or tree roots have grown into the sewer.
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.