Blackberry has no name in Bengali. So it's ok to call it Blackberry (ব্ল্যাকবেরি) in Bengali.
olive is called jolpai in bengali
leek is called piyaj pata in bengali
Dill is called "sowa" in Bengali.
Alsi is called "Tisi" in Bengali.
Introduction is called "পরিচিতি" in Bengali.
Figs are called "dumur" in Bengali.
Brambles
'Spider' is called 'makorsha' in Bengali.
Apricot is called "khumani" in Bengali.
The word for nice in bengali is Bala orShundor.
Flaxseed in bengali is known as 'Tishi'
Banner headline in Bengali is called "ব্যানার শিরোনাম".