difference -
the quality of being unlike or dissimilar; "there are many differences between jazz and rock"
sameness the quality of being alike; "sameness of purpose kept them together"
different differing from all others; not ordinary; "advertising that strives continually to be different"; "this new music is certainly different but I don't really like it"
quality an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare
fluctuation,
variation the quality of being unsteady and subject to changes; "he kept a record of price fluctuations"
discrepancy,
variant,
variance a difference between conflicting facts or claims or opinions; "a growing divergence of opinion"
driftage the deviation (by a vessel or aircraft) from its intended course due to drifting
difference -
a disagreement or argument about something important; "he had a dispute with his wife"; "there were irreconcilable differences"; "the familiar conflict between Republicans and Democrats"