This is the 1019th most frequent Russian word.
домом
"Домом" is the instrumental case of "дом" and means "by/with/as a house."
The word "домом" is the instrumental case form of "дом", indicating 'with the house' or 'as a house'.
Этот домом я горжусь.
I am proud of this house.
Here, "домом" is used in the instrumental case to describe the function or role of the house.
Свой домом он привык пользоваться как мастерской.
He got used to using his house as a workshop.
In this sentence, "домом" is instrumental, highlighting 'with the house' as a means or accompaniment.