inharmonious
unharmonious
absonant
antagonistic
antipathetic
at cross-purposes
at loggerheads
at odds
at variance
at war
atonal
cacophonic
cacophonous
clashing
colliding
conflicting
contradictory
contrary
cracked
cranky
cross
diaphonic
differing
disaccordant
disagreeable
disagreeing
disconsonant
discordant
discrepant
disharmonic
disproportionate
dissentient
dissident
dissonant
divergent
flat
grating
harsh
hostile
immelodious
immiscible
inaccordant
incompatible
inharmonic
jangling
jarring
musicless
negative
nonmelodious
off
all-comprehensive
anthemic
anti-federation
buffo
cocksure
eight-part
everpresent
fast-flowing
full-toned
heart-melting
ministrant
orotund
plagiary
plasmon
quadrupole
remonstrant
rowdier
self-contented
sweet-voiced
towered
well-practiced