List: word usually written using kana alone

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

• potato (Solanum tuberosum)

usually written using kana alone  noun  noun (generic) 

• Japanese yam (Dioscorea japonica)

usually written using kana alone  noun  noun (generic) 

• eastern skunk cabbage (Symplocarpus foetidus)

colloquial  usually written using kana alone  interjection 

• It's nothing!, Don't mention it!

usually written using kana alone  noun  noun (generic) 

• sunbird (any bird in the family Nectariniidae)

usually written using kana alone  noun  noun (generic) 

• sunset morpho (butterfly, Morpho hecuba)

usually written using kana alone  noun  noun (generic) 

• muskrat (Ondatra zibethicus)

usually written using kana alone  noun  noun (generic) 

• aye-aye (Daubentonia madagascariensis)

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

• mahi-mahi (Coryphaena hippurus), common dolphinfish, dolphin, dorado

usually written using kana alone  noun  noun (generic) 

• ponderosa pine (Pinus ponderosa)