This is the 6164th most frequent Japanese word.
カモ
Duck; sucker or easy target (slang).
"カモ" is used to refer to the bird species, meaning "duck."
あの鳥はカモですね。
That bird is a duck.
"カモ" is used metaphorically to mean "a mark" or "someone who is easily deceived or exploited."
彼女はいつも新品のバッグを持ってる人をカモにします。
She always targets people with new bags as easy marks.
"かも" is used as part of the phrase "かも知れません" expressing possibility or uncertainty, equivalent to "might" in English.