These are the updated answers to Wordbrain Knight Level as of January 2019.
Wordbrain Knight Level 1 – priority, prince, unlikely, notice, festival, conflict, lifetime, specifically
Wordbrain Knight Level 2 – effort, opponent, doctor, slight, suppose, battery, instance, burden, depression
Wordbrain Knight Level 3 – system, historic, complain, through, between, witness, climate, retire, purchase
Wordbrain Knight Level 4 – familiar, drawing, apparent, silent, likely, creature, number, limited, somebody
Wordbrain Knight Level 5 – thanks, criminal, identify, channel, duration, compass, uniform, appoint, ground
Wordbrain Knight Level 6 – nowhere, favorite, reader, tragedy, accurate, normally, intend, guilty, headline
Wordbrain Knight Level 7 – musical, complete, supreme, typical, painting, property, gently, directly, ratio
Wordbrain Knight Level 8 – anyway, quietly, pepper, within, division, mineral, protein, account, absolutely
Wordbrain Knight Level 9 – nearby, athletic, probably, oppose, chicken, plastic, printer, module, community
Wordbrain Knight Level 10 – struggle, monster, carrier, fitness, concern, perfect, artist, better, democracy
Wordbrain Knight Level 11 – wealthy, profit, ladder, density, widely, business, auction, lawsuit, particular
Wordbrain Knight Level 12 – worker, sandwich, breach, discover, circle, inform, imagine, Indian, destruction
Wordbrain Knight Level 13 – strongly, resemble, justice, adequate, kitchen, vendor, object, software, crisis
Wordbrain Knight Level 14 – prisoner, numerous, mystery, injury, needle, equally, adjust, funnel, comparison
Wordbrain Knight Level 15 – infinity, vampire, relative, official, fragment, builder, cereal, professional
Wordbrain Knight Level 16 – hungry, bullet, accident, element, chamber, thousand, abroad, butter, definition
Wordbrain Knight Level 17 – veteran, reform, civilian, credit, mountain, amount, explain, regulate, unicycle
Wordbrain Knight Level 18 – umbrella, persuade, inquiry, position, viewer, effect, weekly, visitor, receiver
Wordbrain Knight Level 19 – willing, interest, faculty, throat, coverage, rhythm, shower, support, effective
Wordbrain Knight Level 20 – stranger, ethnic, modest, decline, dividend, qualify, travel, buckle, aggressive

Here are the answers to WordBrain Knight Level Pack

Wordbrain Knight Level 1 – Priority, Prince, Unlikely, Notice, Festival, Conflict, Lifetime, specifically
Wordbrain Knight Level 2 – Effort, Opponent, Doctor, Slight, Suppose, Battery, Instance, Burden, Depression
Wordbrain Knight Level 3 – System, Historic, Complain, Through, Between, Witness, Climate, Retire, Purchase
Wordbrain Knight Level 4 – Familiar, Drawing, Apparent, Silent, Likely, Creature, Number, Limited, Somebody
Wordbrain Knight Level 5 – Thanks, Criminal, Identify, Channel, Duration, Compass, Uniform, Appoint, Ground
Wordbrain Knight Level 6 – Nowhere, Favorite, Reader, Tragedy, Accurate, Normally, Intend, Guilty, Headline
Wordbrain Knight Level 7 – Musical, Complete, Supreme, Typical, Painting, Property, Gently, Directly, Ratio
Wordbrain Knight Level 8 – Anyway, Quietly, Pepper, Within, Division, Mineral, Protein, Account, Absolutely
Wordbrain Knight Level 9 – Nearby, Athletic, Probably, Oppose, Chicken, Plastic, Printer, Module, Community
Wordbrain Knight Level 10 – Struggle, Monster, Carrier, Fitness, Concern, Perfect, Artist, Better, Democracy
Wordbrain Knight Level 11 – Wealthy, Profit, Ladder, Density, Widely, Business, Auction, Lawsuit, Particular
Wordbrain Knight Level 12 – Worker, Sandwich, Breach, Discover, Circle, Inform, Imagine, Indian, Destruction
Wordbrain Knight Level 13 – Strongly, Resemble, Justice, Adequate, Kitchen, Vendor, Object, Software, Crisis
Wordbrain Knight Level 14 – Prisoner, Numerous, Mystery, Injury, Needly, Equally, Adjust, Funnel, Comparison
Wordbrain Knight Level 15 – Infinity, Vampire, Relative, Official, Fragment, Builder, Cereal, Professional
Wordbrain Knight Level 16 – Hungry, Bullet, Accident, Element, Chamber, Thousand, Abroad, Butter, Definition
Wordbrain Knight Level 17 – Veteran, Reform, Civilian, Credit, Mountain, Amount, Explain, Regulate, Unicycle
Wordbrain Knight Level 18 – Umbrella, Persuade, Inquiry, Position, Viewer, Effect, Weekly, Visitor, Receiver
Wordbrain Knight Level 19 – Willing, Interest, Faculty, Throat, Coverage,Rhythm, Shower, Support, Effective
Wordbrain Knight Level 20 – Stranger, Ethnic, Modest, Decline, Dividend, Qualify, Travel, Buckle, Aggressive

The solutions to the puzzles were last updated on April 5, 2019