An attractive suggestion can be replaced with a variety of synonyms to add nuance and variety to your writing. "An alluring proposition" implies a tempting offer or idea. "A captivating notion" suggests something that captivates or holds one's attention. "A charming proposal" suggests a pleasing or delightful idea. "An enticing recommendation" implies that the suggestion is likely to entice or lure someone. "A fascinating idea" suggests that the proposition is captivating and likely to hold interest. "An appealing offer" suggests that the suggestion is likely to charm or win over the reader. Overall, there are many ways to express an attractive suggestion, and using synonyms can help to add variety and interest to your writing.