verb
To concern
regard, relate, have relation, have to do with, apply, be about, answer to, involve, connect, be a matter of, have a bearing on, correspond with, bear upon, comprise, include, belong, pertain, have reference, take in, cover, appertain, point, hold, encompass, incorporate, touch, deal with; see also concern 1.
To mention
allude to, bring up, direct a remark, make reference to, make an allusion to, advert, ascribe, direct attention to, call attention to, attribute, cite, quote, hint at, point out, point to, note, notice, indicate, speak about, suggest, touch on, give as an example, associate, adduce, exemplify, instance, excerpt, extract; see also mention.
To direct
send to, put in touch with, transfer, relegate, commit, submit to, assign, give a recommendation to, introduce; see also designate 1, lead 1.
refer implies deliberate, direct, and open mention of something he referred in detail to their corrupt practices; allude implies indirect, often casual mention, as by a hint or a figure of speech although she used different names, she was alluding to her family