Synonyms of slier

1 Syllable
shrewd, smooth, mean, slick, smart, sharp, arch, wily
2 Syllables
sneaking, bluffing, crooked, secret, scheming, roguish, stealthy, tricky, cunning, impish, subtle, foxy, plotting, cagey, captious, shifty, crafty, covert, artful, canny
3 Syllables
traitorous, deceitful, astute, treacherous, dishonest, guileful, mischievous, insidious, ingenious, conniving, dissembling, furtive, designing, underhand, intriguing
4 Syllables
delusive, illusory, unscrupulous, double-dealing, elusive, deceptive, calculating
5 Syllables
dishonorable