5. (usu. in passive) found, originate, give birth to, institute, establish, constitute; begin, initiate, start, occasion, bring about, set up.
concentrate, v. 1. focus, center, concenter, converge, localize, centralize; compact, consolidate, contract, draw together, constrict, constringe, compress.
2. collect, gather, congregate, agglomerate, aggregate, amass, flock together; assemble, muster, rally, forgather; accumulate, cluster, conglomerate, bunch, pack, crowd, overcrowd, congest, swarm.
3. be engrossed in, be absorbed in, focus attention on, Inf. zero in on; think, ponder, meditate on, contemplate, ruminate, muse over, brood over; apply oneself, Inf. knuckle down, Inf. buckle down, Sl. knock one's brains out, cudgel one's brains; examine, scrutinize, analyze, study.
4. intensify, strengthen, condense, boil down, reduce; purify, Chem. rectify, refine; distill, vaporize, evaporate, extract; coagulate, clot, curdle, thicken, crystallize, concretize.
concentration, n. 1. focus, centrality, convergence; consolidation, drawing together, constriction, compression.
2. collection, gathering, congregation, flock, assemblage, assembly, confluence, conflux; cluster, agglomeration, agglomerate, aggregation, aggregate, mass, amassment, heap, store, hoard; accumulation, clustering, conglomeration, bunching, packing, crowding, overcrowding, congestion, swarming; crowd, multitude, pack, horde, swarm, press, throng.
3. heed, absorption, engrossment, fixed regard, intentness, intensity; close attention, application, diligence, devotion; rumination, pondering, meditation, deep thought; deliberation, consideration, study, scrutiny, examination.
4. intensification, strengthening, condensation, boiling down, reduction; purification, Chem. rectifying; refinement; distillation, evaporation, extraction; coagulation, clotting, thickening, crystallization.
concept, n. idea, notion, conception, conceptualization, abstraction; opinion, belief, view, conviction, presumption, persuasion, apprehension, judgment, surmise; postulate, hypothesis, theory, conjecture; inference, conclusion, consideration.
conception, n. 1. conceiving, originating, hatching, generating; inventing, innovating, initiating, creating; developing, devising, drafting; fashioning, building, forming, fabricating; planning, concocting, producing, evolving; launching, bringing forth.
2. fertilization, fecundation, inception of pregnancy, fertilizing.
3. beginning, origination, source, genesis; outset, in-choation, origin, inception, emergence, commencement, prime, start; introduction, inauguration, initiation; birth, nativity, nascence; incipience, dawn, opening, budding.
4. imagining, deliberating, philosophizing, meditating, speculating; musing, fancying, dreaming, envisaging, envisioning; cogitating, conceptualizing, considering, weighing, concentrating, communing; consideration, speculation, realization, meditation.
5. concept, notion, idea, thought, abstraction, conceptualization, principle; belief, view, opinion, conviction, assumption, supposition, persuasion; surmise, conjecture, hypothesis, theory, postulate; consideration, conclusion, inference, apprehension.
6. design, plan, draft; sketch, outline; scheme, proposal, proposition, projection, delineation.
concern, v. 1. relate to, pertain to, appertain to, have to do with, regard; refer to, apply to, mean, go for; affect, touch, bear on or upon, have bearing on, be relevant to, be of importance or interest to, interest; be connected with, be affiliated with, be involved with.