disagree
nonconvergence
nonconformance
unconvergence
misharmonized
miss the mark
unassimilating
nondeliverance
misfire
unadvancement
missuit
caught between two stools
underdiversify
nonabridgment
omit
mismeet
go nowhere
nondelivery
nonfulfilment
go nowhere fast
fall down
go down the toilet
go out
nonconform
let the grass grow under one's feet
mischeck
clash
unreliably
ununiting
bomb
miss
fall back
uncompatible
noncompliance
nonharmonious
dys-
die in the ass
die on the vine
unlast
inconsistent
unresolving
fumblingness
unconformity
turkey
lag
unattainment
founder
malfunction
unflourishing
inharmoniousness
disharmony
blown
repine
bite the big one
inconcinnity
underwhelm
uncompatibility
noncompetition
off-key
disharmoniousness
luckless
inharmony
strike out looking
uncompliance
nonacquiescence
incohesion
unassimilability
antagonistic
unvalidatable
nonratification
dissonant
disharmonious
inharmonic
unaccording
leave a lot to be desired
nonconformity
discordant
unharmonious
out of keeping with
scantle
nonconformant
unhomogeneity
unharmonized
unreliableness
unreliability
dysharmonious
inharmonious
unsatisfy
halt
skip a beat
nonadherence
nonalienation
nonfulfillment
unsuited
make nothing of
failingly
not win for losing
fail