concentrate

clarify, clean, cleanse, distill (also distil), flush, leach, purge, purify, refine

boil down, decoct, reduce

compact, harden, solidify

deepen, enhance, heighten, intensify

evaporate, extract, remove

enrich, fortify, richen, strengthen

reconcentrate, recondense

aim, direct, home (in on), hone in (on), level, nail, point, set, zero (in on)

attend, heed, mind

fixate (on), obsess (over)

refocus

coordinate, harmonize, integrate, orchestrate

blend, coalesce, combine, fuse, incorporate, merge, reduce

conjoin, join, link

assemble, collect, colligate, gather

reunify, reunite

ball, batch, bunch, cluster, huddle

heap, pile, stack

band, brigade, muster, raise, rally

flock, herd, hive, pack, press, swarm, throng

combine, connect, join, link, merge, pool, unite

arrange, collate, compile, organize, systematize

scrape (up or together)

affiliate, ally, associate, band (together), caucus, club, collaborate, confederate, conjoin, consolidate, consort, cooperate, couple, federate, gang up, join, merge, unite

reassemble, reconvene, regather, remeet

clump, lump

bank, drift, ridge