* Offend means to cause someone to feel hurt, angry, or upset. It implies a negative action that creates a negative reaction.
* Offer means to present something to someone, often as a gift, suggestion, or opportunity. It implies a positive action that aims to benefit the recipient.
Here are some examples to illustrate the difference:
* Offend: "His rude comments offended her."
* Offer: "He offered her a cup of coffee."
While the words sound similar, their meanings are completely opposite.