List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• upside-down fern (Arachniodes standishii)

usually written using kana alone  noun  noun (generic) 

• Japanese holly fern (Cyrtomium fortunei)

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

• sympathy vomiting, vomiting due to the sight or the smell of another person's vomit

usually written using kana alone  noun  noun (generic) 

• rapeseed (Brassica napus), rapa, colza

usually written using kana alone  children's language  noun  noun (generic) 

• pigeon, dove

usually written using kana alone  noun  noun (generic) 

• jetbead (Rhodotypos scandens), white kerria

usually written using kana alone  noun  noun (generic) 

• tip, gratuity, alms

usually written using kana alone  noun  noun (generic) 

• Oncomelania hupensis nosophora (species of tropical freshwater snail)

usually written using kana alone  noun  noun (generic) 

• miyairigai (Oncomelania hupensis nosophora), freshwater snail that acts as an intermediate host of the Japanese blood fluke

usually written using kana alone  noun  noun (generic) 

• love-lies-bleeding (Amaranthus caudatus), tassel flower, velvet flower, foxtail amaranth, Inca wheat