| Neutral | নিরপেক্ষ | Impartial, Unbiased | Biased, Interested |
| Niggardly | কৃপণোচিত | Miserly, Covetous, Inadequacy, Deficiency | Generous, Profuse, Redundant, Excessive |
| Nimble | চটপটে | Prompt, Brisk, Lively, Agile | Sluggish, Languid, Weary, Tardy |
| Nocturnal | নৈশ | Night, Nighttime | Diurnal, Daily |
| Nominal | নামমাত্র | Trifling, Insubstantial, Bare, Negligible | Substantial, Considerable, Excessive, Exorbitant |
| Nonchalant | উদাসীন | Indifferent, Negligent, Uncaring, Heedless | Attentive, Considerate, Vigilant, Scrupulous |
| Notorious | কুখ্যাত | Infamous, Disreputable | Noble, |
| Nourish | পোষণ করা | Sustain, Nurture, Tend, Foster | Exhaust, Starve, Weaken, Enervate |
| Novel | অভিনব | New, Original | Ordinary, Common |
| Novice | শিক্ষণবিশ | Tyro, Beginner, Debutant, Apprentice | Veteran, Ingenious, Experienced, Mentor |
| Noxious | ক্ষতিকর | Baneful, Injurious, Pernicious, Disastrous | Healing, Profitable, Innocuous, Salubrious |
| Nullify | বাতিল করা | Cancel, Annul, Obliterate, Invalidate | Confirm, Uphold, Empower, Endorse |
| Numerous | প্রচুর | Profuse, Various, Multitude, Plenteous | Scarce, Deficient, Paucity, Sparse |
| Obdurate | একগুয়ে | Obstinate, Intractable | Obedient, Docile |
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| Objective | উদ্দেশ্য | Goal, Purpose, Intention, Resolve | Origin, Inception, Deviating, Subjective |
| Obligatory | বাধ্যতামূলক | Compulsory, Imperative | Voluntary , |
| Obliterate | নিশ্চিহ্ন করা | Eradicate, Wipe Out | Create, Construct |
| Obnoxious | নোংরা | Pernicious, Detestable, Abhorrent, Offensive | Attractive, Gratifying, Beneficial, Desirable |
| Obsequious | অন্ত্যেষ্টিক্রিয়া | Slavish, Servile, Sycophantic, Subservient | Insolent, Arrogant, Defiant, Assertive |
| Obsolete | সেকেলে | Outworn, Archaic, Antiquated, Obsolescent | Modern, Novel, Vogue, Contemporary |
| Obstacle | বাধা | Impediment, Help | Aid, |
| Obstinate | জেদি | Stubborn, Resolute, Unyielding, Obdurate | Submissive, Obedient, Amenable, Pliable |
| Obstruct | বাধা দেওয়া | Impede, Prevent, Restrain, Retard | Hasten, Encourage, Expedite, Promote |
| Obvious | স্পষ্টত | Evident, Apparent, Distinct, Conspicuous | Obscure, Ambiguous, Indiscernible, Confusing |
| Occult | গুপ্ত | Latent, Ambiguous, Esoteric, Elusive | Intelligible, Transparent, Fathomable, Scrutable |
| Odious | ঘৃণ্য | Abhorrent, Obnoxious, Prejudice, Malevolent | Engaging, Fascinating, Endearing, Captivating |
| Offensive | কটু, অশোভন | Abhorrent, Arrogant, Insolent, Impudent | Docile Compliant, Courteous, Captivating |
| Offspring | সন্তান-সন্ততি | Descendants, Siblings, Posterity, Progeny | Ancestors, Forefathers, Pedigree, Progenitors |
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| Ominous | ভীতিকর | Threatening, Inauspicious, Forebode, Menacing | Consoling, Auspicious, Propitious, Comforting |
| Omnipotent | সর্বশক্তিমান | All Powerful, | Powerless, Impotent |
| Onerous | কষ্টসাধ্য | Arduous, Troublesome, Inconvenient, Formidable | Facile, Agreeable, Uncomplicated, Flexible |
| Opaque | অস্বচ্ছ | Filmy, Dim, Obscure, Shady | Transparent, Bright, Translucent, Revealing |
| Opportune | সময়োচিত | Timely, Well Timed | Untimely, |
| Oppostion | বিরোধিতা | Resistance, Antagonism | Support, Backing |
| Optimistic | আশাবাদী | Hopeful, Sanguine | Support, Backing |
| Opulence | পাচুর্যতা | Affluence, | Poverty, |
| Oracular | রহস্যময় | Cryptic, Vague, Enigmatic, Profound | Lucid, Distinct, Intelligible, Unambiguous |
| Ordain | আদেশ দান করা | Order, Impose, Prescribe, Proclaim | Revoke, Abolish, Violate, Abrogate |
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| Ornamental | শোভাবর্ধক | Decorative, Adorned, Glamorous, Picturesque | Unseemly, Plain, Blemished, Disfigured |
| Ostensible | বাহ্যত প্রতীয়মান | Apparent, Evident, Obvious, Overt | Concealed, Covert, Obscure, Vague |
| Ostentation | প্রশংসা লাভের জন্য প্রদর্শন | Display, Pretension, Vaunt, Pomposity | Modesty, Constraint, Diffidence, Economy |
| Out Of Date | সেকেলে | Outmoded, Old Fashioned | Modern, |
| Outbreak | প্রাদুর্ভাব | Eruption, Insurrection, Explosion, Outburst | Compliance, Subjection, Passivity, Harmony |
| Outrage | নিষ্ঠুরতা | Offence, Maltreatment, Assault, Irreverent | Praise, Favour, Esteem, Reverence |
| Overbearing | কর্তৃত্বপূর্ণ | Oppressive, Domineering, Intimidating, Despotic | Submissive, Humble, Lenient, Forbearing |
| Oversight | কোন কিছু চোখ এড়িয়ে যাওয়া | Omission, Error, Fault, Slip | Precision, Observance, Circumspection, Caution |
| Overt | দৃষ্টিগোচর | Unconcealed, Public | Covert, Concealed |
| Overwhelm | গুড়িয়ে দেওয়া | Triumph, Subjugate, Overpower, Vanquish | Flounder, Falter, Restore, Impotent |
| Overwrought | অতিমাত্রায় উত্তেজিত | Excited, Agitated, Fervent, Intense | Quiet, Tranquil, Composed, Cool |
| Pacific | শান্ত | Calm, Placid | Agitated, |
