First, I need to identify the words that need to be replaced. The main challenge here is understanding which parts are proper nouns. The text includes "বাংলা", "জীববিজ্ঞান", "অভিধান", and "পিডিএফ". From the context, "বাংলা" is a language, "জীববিজ্ঞান" is a subject, "অভিধান" is a dictionary or glossary, and "পিডিএফ" is a file format. Since these are proper nouns in this context (as they are part of specific terms), they should remain unchanged.
After replacing all replaceable words with three synonyms each in spintax format, ensuring proper nouns remain unchanged. The final output should look like this: biology dictionary bangla pdf
"সার্চ ইঞ্জিনে" is engine, maybe "সার্চ স্ক্রিপ্টে", "সার্চ ফ্ল্যাগে", and keep the original since it's a technical term? Or maybe "সার্চ প্রসেসে". First, I need to identify the words that need to be replaced