Synonyms of unprecedented

1 Syllable

outré, odd, new

2 Syllables

causal, freakish, outre, modern, champer, signal, novel

3 Syllables

singular, fantastic, prodigious, unique, abnormal, newfangled, outlandish, eccentric, exotic, marvelous, aberrant, unusual, uncommon, bizarre, unheard-of

4 Syllables

unrenowned, out-of-the-way, unrivaled, anomalous, unexampled, exceptional, miraculous, remarkable

5 Syllables

generative, unparalleled, preternatural, idiosyncratic, extraordinary