Synonyms of expressionless

1 Syllable
dead, dull
2 Syllables
stony, vacuous, stupid, stonier, wooden, fish-eyed, empty, vacant, deadpan, stolid
3 Syllables
lackluster, straight-faced, lusterless
4 Syllables
inscrutable, impassive, poker-faced
5 Syllables
indistinctive, unexpressive, inexpressive