Synonyms of thinkable

2 Syllables
breezer, cincher
3 Syllables
potential, credible, possible, practical, convincing, likeliest, prepatent, likelier, likely, potentials
4 Syllables
reasonable, cogitable, conceivable, inferable, believeable, practicable, presumable, supposable
5 Syllables
comprehensible, comprehendible, conjecturable, imaginable