Synonyms of ascertained

1 Syllable
size, see, eye, tell, check, fix, dig, read, learn, peg
2 Syllables
eyeball, look-see, confirm, settle
3 Syllables
observed, divine, double-check, establish, guaranteed, discover, verify
4 Syllables
identify, inarguable, discovered, determine
5 Syllables
undisputable, incontestable, establishable, unassailable