Ultimate(adj)
Surpassing all others, definitive.
Penultimate(adj)
Just before the final; next to last
Ultimatum(n)
A demand or threat that is final.
Infinite(adj)
Without beginning or end
Definitive(adj)
Defining for all others; standard
Infinitesimal(adj)
Extremely small, incalculably or immeasurably
small
Novel(adj)
New and different
Novice(n)
An inexperienced person; amateur
Innovative(adj)
Showing creativity, and originality
Primal(adj)
Original, dating from the beginning of existence
Primeval(adj)
Extremely ancient; of earliest time
Primacy(n)
Condition of being first in time or importance