Identify the word that doesn't remain the same in plural form.

• Trout (noun)
Plural form: Trout or Trouts.
English Meaning: any of various salmonid food and sport fishes that are mostly smaller than the typical salmons and are anadromous or restricted to cool clear fresh water.
Bangla Meaning: মিঠাজলের মাছবিশেষ।

কতগুলো শব্দ আছে যাদের singular এবং plural form একই রকম থাকে। যেমন-

• Deer: There is one deer, and there are many deer.
• Species: There is one species, and there are many species.
• Swine: There is one swine, and there are many swine.
• Spacecraft: There is one spacecraft, and there are many spacecraft.
• Sheep: There is one sheep, and there are many sheep.
• Moose: There is one moose, and there are many moose.
• Salmon: There is one salmon, and there are many salmon.

Source:
1. merriam-webster
2. Accessible Dictionary by Bangla Academy.