One way is to build up the tension. Start with milder words like 'attraction' and gradually move to stronger ones like 'ravish' as the story progresses. Also, consider the context. In a historical erotic fiction, words like 'forbidden' and 'scandalous' can add extra flavor. Another important aspect is to make the words flow with the overall tone of the story. If it's a more romantic - based erotic story, words should reflect that soft, loving aspect as well as the sexual aspect.
First, use them sparingly. Don't overcrowd the text with too many 'erotic' words. For example, instead of using 'sensual' every other sentence, use it when it really emphasizes the mood. Second, pair them with strong visual or emotional descriptions. If you use 'caress', describe how the character's fingers gently move along the skin, creating a vivid image.