List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• white-toothed shrew (any rodent of genus Crocidura), shrew

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

• Spain

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

• porcupinefish (Diodon holacanthus), balloonfish

usually written using kana alone  noun  noun (generic) 

• short-beaked echidna (Tachyglossidae spp.), spiny anteater

usually written using kana alone  noun  noun (generic) 

• rook (species of crow, Corvus frugilegus)

usually written using kana alone  noun  noun (generic) 

• Eurasian jay (Garrulus glandarius)

search-only kanji form  usually written using kana alone  expression  noun taking the genitive case particle の  adjective (generic) 

• just right, ideal, perfectly suitable
• fetch!, bring me ...

usually written using kana alone  noun  noun (generic) 

• Sagittaria trifolia var. edulis (edible variant of threeleaf arrowhead)

usually written using kana alone  noun  noun (generic) 

• sirenian (any aquatic mammal of order Sirenia, incl. manatees, and dugongs), sea cow

usually written using kana alone  noun  noun (generic) 

• sea slug (various orthogastropod species, esp. of order Nudibranchia), nudibranch