List: word usually written using kana alone

popular  gikun or jukujikun  rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• dolphin (or other small toothed whales, incl. porpoises, belugas, etc.)

rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• Steller sea lion (Eumetopias jubatus), northern sea lion

gikun or jukujikun  rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• earless seal (Phocidae), true seal, seal

obsolete reading  rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• eared seal (esp. the California sea lion, Zalophus californianus), sea lion

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

• lye
• harsh taste, bitter taste, alkaline taste, astringency
• scum (on a soup, broth etc.)
• (excessive) self-assertiveness, strong individuality, strong idiosyncrasy

rarely used kanji form  JLPT N1  usually written using kana alone  noun  noun (generic) 

• the other way

rarely used kanji form  usually written using kana alone  food, cooking  noun  noun (generic)  historical term 

• sweet rice jelly
• Edo-period herbal medicine used as an antitussive and a breath freshener

rarely used kanji form  usually written using kana alone  adverb  noun  noun (generic) 

• in general, generally, mostly, roughly, largely, mainly, on the whole, by and large
• gist, point, main idea

usually written using kana alone  noun  noun (generic) 

• insulator

dated term  usually written using kana alone  adverb 

• certainly, really, truly, indeed
• possibly, maybe, perhaps, probably