A combination of sounds or musical notes that are not pleasant when heard together -

• A combination of sounds or musical notes that are not pleasant when heard together - Cacophony
Cacophony (noun)

English Meaning: A combination of sounds or musical notes that are not pleasant when heard together.
Bangla Meaning: সুরের অমিল, অনৈক্য।

Synonyms: Dissonance (বেসুরো), Discordance (বৈসাদৃশ্য; মতানৈক্য), Harshness (রুঢ়তা), Disunity (অনৈক্য), Friction, (বৈসাদৃশ্য)।
Antonyms: Harmony (ঐকতান), Similarity (সাদৃশ্য), Union, (ঐক্য) Consistency (মিল), Unanimity (একমত)।

Source: Website Lecture.