Synonyms of attestable

2 Syllables
obvious, certain
3 Syllables
palpable
4 Syllables
conclusive, axiomatic, evincible, positive, undeniable, deducible, inferable, self-evident, verifiable, demonstrable
5 Syllables
indubitable, unmistakable, ascertainable, irrefutable
6 Syllables
incontrovertible