Aqua, aquae, f - first declension noun.
Mors. It is third declension i-stem feminine. (genitive:mortis)
3rd Declension
All languages in which words are inflected variably according to gender, number or case use declension. This includes all the Indo-European languages, even English, although English declension has all but disappeared except in the pronoun.
Third declension.
Vintum means wine. the gender is neuter. And the word is 2nd declension.
Mare (sea) is 3rd declension.
'Tempus' is third declension.
First declension.
Third declension.
Although a strict Latin plural would be formed as census(as it is a fourth declension, not a second declension which would make it censi), the accepted English plural is censuses.
Consul, consulis is third declension.