launderette vs Laundromat

launderette and Laundromat both are nouns.

Word	Noun	Adjective	Verb	Adverb
launderette	Yes	No	No	No
Laundromat	Yes	No	No	No

As nouns, launderette and Laundromat are synonyms defined as:

launderette and Laundromat: a self-service laundry (service mark Laundromat) where coin-operated washing machines are available to individual customers

launderette (noun)	Laundromat (noun)
a self-service laundry (service mark Laundromat) where coin-operated washing machines are available to individual customers	a self-service laundry (service mark Laundromat) where coin-operated washing machines are available to individual customers