List: word usually written using kana alone

usually written using kana alone  noun  noun (generic)  colloquial 

• areca nut
• betel nut

usually written using kana alone  noun  noun (generic) 

• ipecac (species of shrub, Cephaelis ipecacuanha), ipecacuanha

usually written using kana alone  noun  noun (generic) 

• oil palm (esp. the African oil palm, Elaeis guineensis)

usually written using kana alone  noun  noun (generic) 

• sago (edible sago palm starch)

usually written using kana alone  noun  noun (generic) 

• sago palm (Metroxylon sagu)

usually written using kana alone  noun  noun (generic) 

• royal palm (esp. Cuban royal palm, Roystonea regia)

usually written using kana alone  noun  noun (generic) 

• sugar palm (Arenga pinnata)

usually written using kana alone  noun  noun (generic) 

• palmyra (Borassus flabellifer)

usually written using kana alone  noun  noun (generic) 

• lusterleaf holly (Ilex latifolia)
• pattra (palmyra leaves used in Ancient India for writing upon)

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

• thick wakame leaves from near the stem