concentrate synonyms

think examine weigh contemplate ponder muse meditate scrutinize ruminate fasten on focus on pay heed

contract direct mass reduce focus narrow store channel collect combine compact gather aggregate fix bunch strengthen cluster center unite assemble consolidate muster conglomerate embody intensify converge hoard garner swarm huddle congregate compress condense coalesce amass constrict centralize localize agglomerate heap up draw together forgather congest focalize concenter distill crowd together