List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• murmur, mutter, murmuring
• tweet, Twitter post

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

• feigned ignorance, assumed innocence

usually written using kana alone  noun  noun (generic) 

• trifoliate orange (Poncirus trifoliata), hardy orange

usually written using kana alone  noun  noun (generic) 

• Chinese windmill palm (Trachycarpus fortunei), Chusan palm, hemp palm

usually written using kana alone  noun  noun (generic)  noun or participle taking the aux. verb する  intransitive verb 

• staring-out (down) game, game in which two children looking at each other try to make the opponents laugh first
• constant looking at something (e.g. the computer screen, the clock)

usually written using kana alone  noun  noun (generic) 

• tangle, entanglement, snarl
• complication, difficulties, trouble, troubles, snag

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

• padded kimono

usually written using kana alone  noun  noun (generic) 

• narcissus flycatcher (Ficedula narcissina)

usually written using kana alone  noun  noun (generic) 

• American bullfrog (Lithobates catesbeianus)

usually written using kana alone  noun  noun (generic) 

• sandpiper (any bird of family Scolopacidae, incl. the curlews, godwits, phalaropes, redshanks, ruff, snipes, turnstones, and woodcocks)