S: (adj) volatile (evaporating readily at normal temperatures and pressures) "volatile oils"; "volatile solvents"
S: (adj) explosive, volatile (liable to lead to sudden change or violence) "an explosive issue"; "a volatile situation with troops and rioters eager for a confrontation"
W: (adj) constant [Indirect via inconstant] (steadfast in purpose or devotion or affection) "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"
S: (adj) volatile (tending to vary often or widely) "volatile stocks"; "volatile emotions"
S: (adj) changeable, changeful (such that alteration is possible; having a marked tendency to change) "changeable behavior"; "changeable moods"; "changeable prices"