to cause something to become greater in number or quantity

gather or amass something

to collect (a great deal of money, power)

gather, accumulate

(to cause people) to gather together

congregate

a short Christian prayer to be said on certain days

accumulate, come together

to come together

assemble, come together

(to call people) to come together (for a meeting etc)

bring together; meet

to get, come or bring together

come or bring together

(to cause (people)) to form again into groups or into new groups

reorganize, unite