Synonyms for Otiose:

adj.

all (adjective)
superfluous, wasted, pointless.
futile (adjective)
hopeless, useless.
lazy (adjective)
idle, slothful, indolent, listless.
meaningless (adjective)
hollow.
useless (adjective)
futile, superfluous, lazy, empty, hollow.

n.

defective, pathetic, faulty, inefficient. empty, vacant, full, hollow. futile (noun)
hopeless.
lazy (noun)
listless.
otiose (noun)
ineffectual, faineant, wasted, useless, slothful, unavailing, lazy, superfluous, work-shy, idle, worthless, indolent, futile, pointless.

Other synonyms:

empty, hollow. vacant. Other relevant words:
full, hollow, listless, faulty, pathetic, empty, futile, vacant, inefficient, hopeless, defective.