Sleeker Synonyms and Antonyms

Affectedly and self-servingly earnest
(Adjective)
Synonyms:
  1. smarmier
  2. oilier
Smooth, glossy
(Adjective)
Synonyms:
  1. silkier
Antonyms:
  1. rougher
  2. duller
Having a smooth, gleaming surface reflecting light
(Adjective)