127 synonyms for concern such as business, analyse, affect, be interested/involved in, agitation, affair, agency, and bureau. Concern is a verb, and its antonyms are serenity, peace of mind, and indifference.
Analyse, appertain to, be about, be connected with, cover, deal with, discuss, examine, go into, have to do with, pertain to, regard, relate to, review, scrutinize, study, tell of, and treat.
Affect, affected, apply to, be important to, be of importance to, be of interest to, be relevant to, be the business of, bear on, connected, have a bearing on, impact on, implicated, interest, interested, involve, involved, pertain to, and related.
Be interested/involved in, bother oneself with, busy oneself with, devote one's time to, interest oneself in, involve oneself in, notice, occupy oneself with, take a hand in, take an interest in, and take notice of.
Agitation, anxiety, apprehension, apprehensiveness, care, caringness, concernment, consideration, consternation, disquiet, disquietude, distress, perturbation, regard, solicitousness, solicitude, sympathy, thought, unease, uneasiness, worriment, and worry.
Affair, area of activity, area of interest, baby, bag, bailiwick, be applicable to, be relevant to, business, charge, department, duty, funeral, have a bearing on, have relevance for, headache, importance, interest, job, lookout, occupation, pigeon, preserve, problem, province, responsibility, sphere, task, and worry.
Agency, bureau, business, combine, company, conglomerate, consortium, cooperative, corporation, enterprise, establishment, firm, franchise, group, house, industry, office, operation, organization, outfit, partnership, practice, set-up, shop, syndicate, undertaking, and venture.