collecting; accumulating; gathering

collection (of art, stamps, insects, etc.)

収集 only

garbage collection; waste collection

settlement; village; community; town

しゅうらく only; Biology

(bacterial) colony

crowd; community; group; herd; gathering; assembly

agglomeration; clumping together

Physics

cohesion (of ions, etc.)

Chemistry

flocculation (of colloidal particles)

Biology

agglutination

grey wall covering material (gray)

collection of similar objects; classification by similarity

(levying of a) heavy taxation

collection and distribution

Wamyōruijushō (famous Heian-period Japanese dictionary)

Rare term

inhabiting a region (esp. in China); living in a concentrated community