List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• Western honeybee, European honeybee (Apis mellifera)

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

• Okinawan habu (Trimeresurus flavoviridis)

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

• Taiwanese habu (Trimeresurus mucrosquamatus)

usually written using kana alone  noun  noun (generic) 

• Japanese eel (Anguilla japonica)

usually written using kana alone  noun  noun (generic) 

• common Japanese conger eel (Conger myriaster), whitespotted conger

usually written using kana alone  noun  noun (generic) 

• asp viper (Vipera aspis)

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

• viper (esp. a pitless viper)

usually written using kana alone  noun  noun (generic) 

• European adder (Vipera berus)

usually written using kana alone  noun  noun (generic) 

• Argiope amoena (species of orb-weaving spider)

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

• wasp spider (Argiope bruennichi)