Appendix:Slovak declension pattern dub - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

pattern dub m, noun

dub stem

• nom dub
• gen dub-a
• dat dub-u
• acc dub
• loc dub-e
• ins dub-om

• nom dub-y
• gen dub-ov
• dat dub-om
• acc dub-y
• loc dub-och
• ins dub-mi

Inanimate masculine nouns declined by the pattern dub have the genitive singular ending of either -a or -u. There is no quick rule to tell which noun uses which ending.

• chlap
• hrdina
• stroj