meritless vs no-good

meritless and no-good both are adjectives.

Word	Noun	Adjective	Verb	Adverb
meritless	No	Yes	No	No
no-good	No	Yes	No	No

As adjectives, meritless and no-good are synonyms defined as:

Other synonyms of meritless include good-for-naught, good-for-nothing, no-account, no-count, sorry.

meritless (adjective)	no-good (adjective)
without merit; of little or no value or use	returned for lack of funds
	without merit; of little or no value or use