powerless vs ineffective

powerless and ineffective both are adjectives.

Word	Noun	Adjective	Verb	Adverb
powerless	No	Yes	No	No
ineffective	No	Yes	No	No

powerless (adjective)	ineffective (adjective)
lacking power	not producing an intended effect
	lacking in power or forcefulness
	lacking the ability or skill to perform effectively; inadequate