+17 = 21

ㄔㄢˊchán

ㄔㄢˊchán
sandalwood (Santalum album)​, a Nepalese tree producing valuable fragrant oil, comet
Komet (S, Astron)​, Sandelbaum (Santalum album)​ (S, Bio)​, Komet (S)​
comète