Synonyms For "Greats" :
1 syllable:
big, good, keen, large, neat, old, swell
2 syllables:
bully, corking, cracking, dandy, enceinte, gravid, groovy, heavy, nifty, not bad, peachy, smashing, with child
3 syllables:
capital, expectant, important, majuscule, of import, outstanding