Antonyms for the term "horror-struck" can be words like joyful, happy, delighted, pleased, enchanted or even impressed. Horror-struck means being terrified or extremely fearful. Therefore, the antonyms for this term represent positive emotions and feelings. These antonyms can be a great addition to a vocabulary because they help to convey different emotions and feelings, whether in writing, speech or reading. However, it is important to note that these antonyms should only be used in contexts where their meaning is accurate and appropriate, as using them in the wrong context can lead to misunderstandings or misinterpretations.