changeful,
changeable such that alteration is possible; having a marked tendency to change; "changeable behavior"; "changeable moods"; "changeable prices"
unchangeable not changeable or subject to change; "a fixed and unchangeable part of the germ plasm"-Ashley Montagu; "the unchangeable seasons"; "one of the unchangeable facts of life"
quality an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare
fluidity,
fluidness a changeable quality; "a charming Oriental fluidity of manner"; "a certain fluidness in his perception of time made him an unpredictable colleague"; "demographers try to predict social fluidity"
reversibility the quality of being reversible in either direction
shiftiness the quality of being changeable in direction; "the shiftiness of the wind caused the boat to veer unpredictably"
