List: noun (common) (futsuumeishi)

popular  noun  noun (generic)  noun or participle taking the aux. verb する  transitive verb 

• security, guarantee, collateral, mortgage
• guarantee (e.g. of safety)

popular  JLPT N2  noun taking the genitive case particle の  adjective (generic)  noun  noun (generic) 

• short-term

popular  rarely used kanji form  JLPT N3  noun  noun (generic) 

• knowledge, information

popular  JLPT N2  noun  noun (generic) 

• friend, acquaintance

popular  JLPT N2  noun  noun (generic) 

• zone, area, belt, region

popular  JLPT N1  noun  noun (generic) 

• delay, lag, postponement, falling behind

popular  JLPT N2  noun  noun (generic) 

• bamboo (any grass of subfamily Bambusoideae)
• middle (of a three-tier ranking system)

popular  JLPT N4  noun  noun (generic) 

• junior high school, middle school, lower secondary school

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

• nucleus, backbone, mainstay, key figure
• medium-level, mid-level, middle-ranking, midsize
• main body (of troops), crack troops, select troops
• center field, centre field, center fielder, centre fielder
• athlete competing in the middle-number match in a team competition, i.e. second in 3-on-3, third in 5-on-5 (kendo, judo, etc.)

popular  obsolete kanji  JLPT N5  noun  noun (generic)  adverb 

• noon, midday
• daytime
• lunch