Adverb
1. early on
2. ahead of time
3. too soon, betimes
Adjective
1. early
2. aboriginal, primal, primeval, primaeval, primordial, advance, beforehand, archean, archaean, archeozoic, archaeozoic, azoic, earlier, earliest, earlyish, matutinal, premature, untimely, previous, premature, proterozoic, proto, wee, first, early
3. archaic, primitive, new, young, crude, primitive, rude, embryonic, embryotic, incipient, inchoate, precocious, former
4. other, past, young
5. immature, early
6. Old, future