List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• fiddler crab (esp. species Uca arcuata)

irregular kanji usage  usually written using kana alone  noun  noun (generic) 

• aconite (esp. species Aconitum japonicum), wolfsbane, monkshood
• traditional bugaku hat

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

• soused mackerel, vinegared mackerel

usually written using kana alone  noun  noun (generic) 

• sugar beet (Beta vulgaris)

usually written using kana alone  noun  noun (generic) 

• rabbitear iris (Iris laevigata)

usually written using kana alone  noun  noun (generic) 

• thoroughwort (species of boneset, Eupatorium fortunei)

search-only kana form  search-only kanji form  usually written using kana alone  noun  noun (generic) 

• udo (plant related to ginseng, used in medicine and cooking) (Aralia cordata)

usually written using kana alone  adverb 

• suddenly, all at once, rapidly

usually written using kana alone  noun  noun (generic) 

• rainbow trout (Oncorhynchus mykiss)

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

• twist, spin
• ingenuity, sophistication (e.g. of writing style), taste
• monetary offering (or gift) wrapped in paper
• twisting throw