| cluster | |
| agric. | druiventros |
| health. | massa; opeenstapeling; ophoping |
| hobby transp. | valschermtros |
| mater.sc. | defectenopeenhoping |
| math. | cluster |
| nat.res. | kluwen; zaaizaadkluwen |
| nucl.phys. | splijtstofelementenbundel |
|
straggly : 2 phrases in 1 subject |
| Agriculture | 2 |