Open English Wordnet
Adjectives
(s)conscienceless, unconscionablelacking a conscience“a conscienceless villain”, “brash, unprincipled, and conscienceless”, “an unconscionable liar”
(s)exorbitant, extortionate, outrageous, steep, unconscionable, usuriousgreatly exceeding bounds of reason or moderation“exorbitant rent”, “extortionate prices”, “spends an outrageous amount on entertainment”, “usurious interest rate”, “unconscionable spending”