wish-wash vs hackwork

wish-wash and hackwork both are nouns.

Word	Noun	Adjective	Verb	Adverb
wish-wash	Yes	No	No	No
hackwork	Yes	No	No	No

As nouns, hackwork is a hyponym of wish-wash; that is, hackwork is a word with a more specific, narrower meaning than wish-wash:

wish-wash: nonsensical talk or writing
hackwork: (Literary & Literary Critical Terms) undistinguished literary work produced to order.

wish-wash (noun)	hackwork (noun)
nonsensical talk or writing	professional work done according to formula
any thin watery drink	(Literary & Literary Critical Terms) undistinguished literary work produced to order.