washer vs laundrywoman

washer and laundrywoman both are nouns.

Word	Noun	Adjective	Verb	Adverb
washer	Yes	No	No	No
laundrywoman	Yes	No	No	No

As nouns, laundrywoman is a hyponym of washer; that is, laundrywoman is a word with a more specific, narrower meaning than washer:

Other hyponyms of washer include laundryman, washerman, laundress, washerwoman, washwoman, window washer, washman.

washer (noun)	laundrywoman (noun)
a home appliance for washing clothes and linens automatically	a working woman who takes in washing
seal consisting of a flat disk placed to prevent leakage
someone who washes things for a living