Positive · Singular
| Masculine | Feminine | Neuter |
| Nominative |
κραταιός, κραταιὸς |
κραταιή, κραταιὴ |
– |
| Genitive |
κραταιοῦ |
κραταιᾶς, κραταιῆς |
– |
| Dative |
κραταιῷ |
κραταιῇ |
– |
| Accusative |
– |
κραταιὰν |
κραταιόν, κραταιὸν |
| Vocative |
– |
– |
– |
Positive · Dual
| Masculine |
| Nominative |
κραταιὼ |
| Genitive |
– |
| Dative |
– |
| Accusative |
κραταιώ |
| Vocative |
– |
Positive · Plural
| Masculine | Feminine | Neuter |
| Nominative |
– |
– |
κραταιὰ, κραταιά |
| Genitive |
κραταιῶν |
– |
– |
| Dative |
– |
κραταιαῖς |
– |
| Accusative |
κραταιοὺς |
– |
– |
| Vocative |
– |
– |
– |
Comparative · Singular
| Feminine |
| Nominative |
κραταιοτέρη |
| Genitive |
– |
| Dative |
– |
| Accusative |
– |
| Vocative |
– |