List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• dark sleeper (species of sleeper goby, Odontobutis obscura)

usually written using kana alone  noun  noun (generic) 

• fly swatter, flyswatter, fly swat

usually written using kana alone  noun  noun (generic) 

• pair (esp. of mated animals), brace, couple
• (anatomical) joint

usually written using kana alone  noun  noun (generic) 

• legless lizard (esp. Anguidae spp., incl. glass lizards and slow worms)

usually written using kana alone  noun  noun (generic) 

• caecilian (any burrowing legless amphibian of the order Gymnophiona)

usually written using kana alone  noun  noun (generic) 

• Machilus thunbergii (species of laurel)

usually written using kana alone  noun  noun (generic) 

• paper mulberry (Broussonetia papyrifera)

usually written using kana alone  noun  noun (generic) 

• Broussonetia kazinoki (species of mulberry)

usually written using kana alone  noun  noun (generic) 

• common hornwort (Ceratophyllum demersum)
• Analipus japonicus (species of brown alga)

usually written using kana alone  noun  noun (generic) 

• Miquel's mazus (species of small flowering plant, Mazus miquelii)