superfluous vs purposeless

superfluous and purposeless both are adjectives.

Word	Noun	Adjective	Verb	Adverb
superfluous	No	Yes	No	No
purposeless	No	Yes	No	No

As adjectives, superfluous and purposeless are synonyms defined as:

superfluous and purposeless: serving no useful purpose; having no excuse for being

Other synonyms of superfluous include otiose, pointless, senseless, wasted.

superfluous (adjective)	purposeless (adjective)
more than is needed, desired, or required	not evidencing any purpose or goal
serving no useful purpose; having no excuse for being	serving no useful purpose; having no excuse for being