List: noun (generic)

popular  JLPT N2  noun  noun (generic)  philosophy  mathematics 

• form (as opposed to substance)
• format, form, style, manner
• formality, form
• mode, form
• form (bilinear, quadratic, etc.)

popular  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic) 

• series, sequence, system, succession
• keiretsu (group), conglomeration of businesses linked by cross-shareholdings
• affiliated, subsidiary

popular  JLPT N5  noun  noun (generic) 

• police officer, policeman, constable

popular  JLPT N2  noun  noun (generic) 

• public entertainment, performing arts
• accomplishments, attainments

popular  JLPT N2  noun  noun (generic) 

• blood

popular  ateji  rarely used kanji form  JLPT N3  な adjective  adjective (generic)  adverb  archaic  noun  noun (generic) 

• splendid, magnificent, excellent, fine, superb, beautiful, admirable
• utter (esp. defeat), total, complete
• something worth seeing, sight, spectacle

popular  search-only kanji form  JLPT N3  noun  noun (generic)  counter 

• origin, source, beginning
• basis, base, foundation, root
• cause
• (raw) material, ingredient, base, mix (e.g. for a cake), (soup) stock
• (one's) side
• capital, principal, cost price
• root (of a plant), (tree) trunk
• part (of a brush, chopsticks, etc.) one holds (with the hand)
• first three lines of a waka
• counter for plants or trees
• counter for falcons (in falconry)

popular  JLPT N1  noun  noun (generic) 

• sovereign, ruler, head of state

popular  JLPT N1  noun  noun (generic)  mathematics 

• starting point, origin, beginning
• origin (of coordinate axes)
• datum point

popular  JLPT N1  abbreviation  noun  noun (generic) 

• atomic bomb, A-bomb