List: word usually written using kana alone

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

• protein
• egg white, albumen, albumin

popular  rarely used kanji form  JLPT N5  godan verb  godan verb (archaic)  verb (generic)  intransitive verb  usually written using kana alone 

• to meet, to encounter, to see
• to have an accident, to have a bad experience

popular  obsolete kanji  usually written using kana alone  noun  noun (generic) 

• firefly (Luciola cruciata), lightning bug, glowworm

popular  search-only kana form  chemistry  noun  noun (generic)  abbreviation  usually written using kana alone 

• carbonic acid
• carbonated water, carbonated drink
• baking soda, sodium carbonate

popular  JLPT N1  usually written using kana alone  adverb 

• (cannot) possibly, (not) by any means, (not) at all, utterly, absolutely

popular  obsolete kanji  Buddhism  noun  noun (generic)  usually written using kana alone  abbreviation 

• Amitabha (Buddha), Amida
• ghostleg lottery, ladder lottery, lottery in which participants trace a line across a lattice pattern to determine the winner
• wearing a hat pushed back on one's head

popular  gikun or jukujikun  noun  noun (generic)  abbreviation  usually written using kana alone 

• Inari (god of harvests, Uka-no-Mitama)
• Inari shrine, Fushimi Inari shrine (in Kyoto)
• fox (said to be messengers of Inari)
• fried tofu (said to be a favourite food of foxes)
• inarizushi

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

• gun, pistol
• ohajiki, traditional children's game similar to marbles, played with coin-shaped pieces of coloured glass or plastic
• repellence

popular  godan verb  godan verb (archaic)  verb (generic)  transitive verb  usually written using kana alone  sports 

• to smoke (a cigarette, pipe, etc.), to puff on, to puff out (smoke)
• to rev (an engine), to race
• to put on (an air of), to act in a ... way, to behave as, to play (the role of)
• to shoot (a ball) too high, to blast over the bar

popular  obsolete reading  JLPT N1  usually written using kana alone  adverb  noun taking the genitive case particle の  adjective (generic) 

• wholly, solely, entirely, exclusively, devotedly, fixedly
• principally, mostly, chiefly, mainly