гов

Ман шаш сар гов дорам.
I have six cows.
Аз пӯсти гов чарм истеҳсол мекунанд.
Leather is produced from cow skin.

Bonus:
Special Counting Words (нумератив)
Tajik has some special words used with numbers. These are called classifiers or numeratives. They are often left out when translating into English. Examples-
дона: piece, unit
сар: head (for counting animals)
нафар: person (for counting people)

Alternatively, the classifier то (or та) can be added as a suffix to the number.
Ман шашто гов дорам. I have six cows.

In Tajik, the plural ending ҳо is not used on the noun when it is preceded by a number.