Adjective
1. 1
2. i, ane, cardinal, unspecified
3. unitary
4. united, same
5. extraordinary
6. indefinite
7. single
8. single
9. combined
10. matchless
Noun
1. nonpareil, one and only, peerless, unmatched, unmatchable, unrivaled, unrivalled, incomparable, uncomparable, 1
2. I, ace, single, unity, digit, figure, unit