A-One

Antonyms for a-one:

inferior.

Synonyms for a-one:

all (adjective)

super, tops, topnotch, ace, first-rate, tiptop.

Sense 1

topflight, blue-ribbon, tophole.

Sense 2

first class.

Sense 3

dandy, champion, prime.

Sense 4

fine, great.

Sense 5

splendid, boss, terrific.

Sense 8

quality.

first class

excellent.

Other synonyms and related words:

fine, champion, terrific, dandy, great, quality, prime, boss, excellent, blue-ribbon, tip-top, first class, tophole, splendid, topflight.

Sense 1 (noun)

champion, tophole, fine, topflight, splendid, prime, boss, great, dandy, blue-ribbon, first class, excellent, terrific, quality.

a-one (noun)

super, tiptop, tops, superior, first-rate, topnotch, ace.