supernumerary
on its way out
redundancy
carry coals to Newcastle
redundundant
irredundance
pleonastic
reredundant
kick at an open door
redundantly
Abundita
unnecessarily
surplus to requirements
nonredundant
redundantant
not worth a whistle
supernumerous
waste of time
mug's game
mission
as much use as a chocolate fireguard
unnecessariness
plow the sands
bureaucrazy
unneededness
impairment
good for nothing
stultification
deadening
knack
constipation
make bricks without straw
uncalled-for
needless
get over
perissological
gratuitous
that and a nickel will buy you a cup of coffee
immiscibility
at all costs
unuseful
incomplete
doss around
for the birds
bootless
grail
doss about
ill-suited
vacuity
inutility
unnecessitate
useless as tits on a boar hog
necessitous
antiredundancy
run to waste
lie down on the job
fruitless
faff
Sisyphean labour
go to waste
litany
hang by the eyelids
deshelve
make a meal of
piss in the wind
uselessness
idly
indecomposability
idlily
lackadaisically
good-for-nothing
make unnecessary
inevitably
cripple
utilizability
inescapably
ineluctably
save
unavoidably
stultify
garbageness
needlessly
blivit
botch
dead donkey
jabberwocky
indispensability
unadvantageously
indestructibility
necessitude
push against an open door
unnecessity
bludge
makeshift
imposition
nit-noid
necessity
boondoggle
needcessity