The word "more slaughtered" is a gruesome description of an act of killing or sacrificing animals. However, if you are looking for synonyms to replace this phrase, you can use terms such as "massacre", "butcher", "hunt down", "execute" or "annihilate". These words can evoke a similar level of brutality, but they offer more variety and a stronger vocabulary. Alternatively, you may want to use a more neutral word such as "harvest" or "cull" to describe the same activity in a less graphic way. Ultimately, the choice of words will depend on the intended tone and context of your piece of writing.