List: word usually written using kana alone

usually written using kana alone  adverb 

• one by one, thoroughly, exhaustively, with a fine-tooth comb

usually written using kana alone  noun  noun (generic) 

• Japanese green gentian (Swertia japonica)
• alderfly (esp. species Sialis japonica), alder fly

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

• black-legged kittiwake (Rissa tridactyla)

usually written using kana alone  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic) 

• mitsuba (Cryptotaenia japonica), Japanese honewort, Japanese honeywort, Japanese chervil, Japanese parsley
• three-leaved, trefoil

usually written using kana alone  noun  noun (generic) 

• barred button quail (Turnix suscitator)

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

• haircap moss

usually written using kana alone  noun  noun (generic) 

• field horsetail (Equisetum arvense), common horsetail

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

• wintersweet (Chimonanthus praecox), Japanese allspice

usually written using kana alone  noun  noun (generic) 

• Anopheles (genus of mosquitoes)

usually written using kana alone  noun  noun (generic) 

• swift (any bird of family Apodidae)
• fork-tailed swift (Apus pacificus)