Wait, the user said "all words with 3 synonyms in spintax: y. Proper nouns stay. Only output text."
The original sentence has "a 2018 sci-fi thriller". "Sci-fi" is a compound adjective here. The user might want to replace both "sci-fi" and "thriller". So "sci-fi" becomes "science fiction|speculative fiction|technological", and "thriller" becomes "suspense|suspenseful|tense". The Meg -2018- 720p Dual Auds -Hindi -Cleaned- Eng- X264
But "sci-fi" might be better left as is since it's a genre term. But the user wants synonyms for all words except proper nouns. Let me check. "Sci-fi" is not a proper noun, so need to replace with synonyms. However, synonyms for "sci-fi" could be "science fiction|fantasy|dystopian", but maybe "science fiction" is more accurate. Let me use that. Wait, the user said "all words with 3 synonyms in spintax: y