List: word usually written using kana alone

popular  noun  noun (generic)  noun (suffix)  usually written using kana alone  slang 

• popularity, favour, favor, reception
• defense, defence, reputation
• agreement
• receiver of technique (e.g. in martial arts)
• bottom (submissive partner of a homosexual relationship)

popular  JLPT N1  usually written using kana alone  pre-noun adjectival  adjective (generic) 

• mere, only, just, slight

popular  irregular okurigana  JLPT N3  noun  noun (generic)  usually written using kana alone 

• mark, sign
• symbol, emblem
• badge, crest, flag
• evidence, proof
• token (of gratitude, affection, etc.)

popular  irregular kanji usage  JLPT N3  usually written using kana alone  adverb 

• together, jointly
• at the same time, with, as ..., including, along with
• both

popular  JLPT N5  noun  noun (generic)  abbreviation  usually written using kana alone  slang 

• cat (esp. the domestic cat, Felis catus)
• shamisen
• geisha
• wheelbarrow
• clay bed-warmer
• bottom (submissive partner of a homosexual relationship)

popular  rarely used kanji form  JLPT N5  な adjective  adjective (generic)  usually written using kana alone  interjection 

• disliking, not wanting, unwilling (to do), reluctant
• unpleasant, disagreeable, nasty, horrible, disgusting, undesirable, unwelcome
• no!, quit it!, stop!

popular  JLPT N2  usually written using kana alone  godan verb  godan verb (archaic)  verb (generic)  intransitive verb 

• to bear fruit

popular  JLPT N3  usually written using kana alone  expression  adverb 

• any, anything, whatever, whatever one likes, everything, all
• I am told, I hear, I understand, they say

popular  noun  noun (generic)  noun (suffix)  usually written using kana alone 

• riding, ride
• spread (of paints)
• -seater (e.g. two-seater)
• (getting into the) mood, (entering into the) spirit, energy, enthusiasm, rhythm, feeling

popular  JLPT N5  な adjective  adjective (generic)  noun  noun (generic)  usually written using kana alone 

• disliked, hated, disagreeable
• tendency, smack (of), touch (of)
• distinction, discrimination