well
Perhaps I have not expressed myself very well.

fully
She expresses herself most fully in her paintings.

forcefully, strongly
repeatedly
explicitly
openly, publicly
He expressed his anger openly.

privately
freely
Differences of opinion were freely expressed in public debate.

clearly
simply
cogently
Students must learn to express a point of view cogently and with clarity.

exactly, precisely
concisely, succinctly
eloquently
The poet eloquently expresses the sense of lost innocence.

be able to, feel able to
be unable to, feel unable to
Many patients feel unable to express their fears.

find it difficult to

a chance to express sth, an opportunity to express sth

Express is used with these nouns as the subject:
report, union, word

Express is used with these nouns as the object:
admiration, affection, aggression, alarm, alienation, amazement, ambivalence, anger, annoyance, antagonism, antipathy, anxiety, appreciation, apprehension, approval, astonishment, attitude, belief, bitterness, concern, condemnation, condolences, confidence, congratulations, consternation, contempt, conviction, creativity, criticism, delight, desire, determination, devotion, disagreement, disappointment, disapproval, disbelief, discontent, disdain, disgust, dislike, dismay, displeasure, dissatisfaction, dissent, distaste, distress, distrust, doubt, emotion, empathy, enthusiasm, envy, essence, exasperation, exuberance, faith, fear, feeling, frustration, fury, gratitude, grief, grievance, hatred, hope, horror, hostility, idea, identity, impatience, indifference, indignation, individuality, interest, irritation, joy, judgement, love, loyalty, meaning, milk, misgivings, need, opinion, opposition, optimism, outrage, pain, passion, personality, pessimism, point of view, preference, prejudice, pride, proposition, rage, readiness, regret, relief, reluctance, remorse, resentment, reservation, revulsion, sadness, satisfaction, scepticism, self, sentiment, sexuality, shock, solidarity, sorrow, support, surprise, suspicion, sympathy, thanks, thought, uncertainty, unease, unhappiness, view, viewpoint, willingness, wish, wonder, worry, yearning

Express is used with these nouns:
aim, authorization, checkout, coach, consent, delivery, elevator, instruction, lane, mail, permission, provision, reference, term, train, undertaking, wish