useless vs ineffectual

useless and ineffectual both are adjectives.

Word	Noun	Adjective	Verb	Adverb
useless	No	Yes	No	No
ineffectual	No	Yes	No	No

useless (adjective)	ineffectual (adjective)
having no beneficial use or incapable of functioning usefully	not producing an intended effect
	lacking in power or forcefulness
	producing no result or effect