washing-up vs washing

washing-up and washing both are nouns.

Word	Noun	Adjective	Verb	Adverb
washing-up	Yes	No	No	No
washing	Yes	No	No	No

As nouns, washing is a hypernym of washing-up; that is, washing is a word with a broader meaning than washing-up:

Other hypernyms of washing-up include lavation, wash.

washing-up (noun)	washing (noun)
the washing of dishes etc after a meal	the work of cleansing (usually with soap and water)
	garments or white goods that can be cleaned by laundering