There are many synonyms for the phrase "poison her own husband", and each implies a different level of intentionality and malice. Some synonyms include "murder her husband", "assassinate her spouse", "eliminate her mate", "dispatch her partner", "eradicate her beloved", and "extinguish her significant other". Other less violent synonyms could include "leave her husband", "abandon her spouse", or "end her marriage". Regardless of the specific terminology used, the act of harming one's own partner is a serious and potentially criminal offense that should be treated with the utmost seriousness.