inconstant[adjective]Synonyms: capricious, changeable, fickle, inconsistent, lubricious, mercurial, temperamental, ticklish, uncertain, unstable, variable, volatile, mutable, shifty, slippery, unsteady
Antonyms: constant
Contrasted words: dependable, reliable, trustworthy, trusty, faithful, loyal, resolute, staunch, steadfast, true
Related Words: changeful, 
mutable, 
protean, 
unsettled, 
unsteady, 
elusive, 
erratic, 
vacillating, 
vagrant, 
wavering, 
wayward, 
irresolute, 
shifty, 
shilly-shally, 
undependable, 
unreliable, 
disloyal, 
faithless, 
false, 
perfidious, 
traitorous, 
treacherous, 
untrue, 
frivolous, 
light, 
light-minded [TahlilGaran] English Synonym Dictionary ▲