All hardline synonyms

adj hardline

• obstinate — firmly or stubbornly adhering to one's purpose, opinion, etc.; not yielding to argument, persuasion, or entreaty.
• rigid — stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal.
• tough — strong and durable; not easily broken or cut.
• hostile — of, relating to, or characteristic of an enemy: a hostile nation.
• unwavering — to sway to and fro; flutter: Foliage wavers in the breeze.
• militant — vigorously active and aggressive, especially in support of a cause: militant reformers.
• staunch — firm or steadfast in principle, adherence, loyalty, etc., as a person: a staunch Republican; a staunch friend.
• uncompromising — not admitting of compromise or adjustment of differences; making no concessions; inaccessible to flexible bargaining; unyielding: an uncompromising attitude.
• hard-core — unswervingly committed; uncompromising; dedicated: a hard-core segregationist.
• unyielding — unable to bend or be penetrated under pressure; hard: trees so unyielding that they broke in the harsh north winds.
• implacable — not to be appeased, mollified, or pacified; inexorable: an implacable enemy.
• inexorable — unyielding; unalterable: inexorable truth; inexorable justice.
• incompatible — not compatible; unable to exist together in harmony: She asked for a divorce because they were utterly incompatible.
• incongruous — out of keeping or place; inappropriate; unbecoming: an incongruous effect; incongruous behavior.
• inconsistent — lacking in harmony between the different parts or elements; self-contradictory: an inconsistent story.
• assertive — Someone who is assertive states their needs and opinions clearly, so that people take notice.
• cocky — Someone who is cocky is so confident and sure of their abilities that they annoy other people.
• stubborn — unreasonably obstinate; obstinately unmoving: a stubborn child.
• stringent — rigorously binding or exacting; strict; severe: stringent laws.
• austere — If you describe something as austere, you approve of its plain and simple appearance.
• harsh — ungentle and unpleasant in action or effect: harsh treatment; harsh manners.
• solid — having three dimensions (length, breadth, and thickness), as a geometrical body or figure.
• definite — If something such as a decision or an arrangement is definite, it is firm and clear, and unlikely to be changed.
• rigorous — characterized by rigor; rigidly severe or harsh, as people, rules, or discipline: rigorous laws.
• fixed — fastened, attached, or placed so as to be firm and not readily movable; firmly implanted; stationary; rigid.
• flinty — composed of, containing, or resembling flint, especially in hardness.
• rigid — stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal.
• grim — stern and admitting of no appeasement or compromise: grim determination; grim necessity.
• steely — consisting or made of steel.
• terrible — distressing; severe: a terrible winter.
• desperate — If you are desperate, you are in such a bad situation that you are willing to try anything to change it.
• fierce — menacingly wild, savage, or hostile: fierce animals; a fierce look.
• narrow — of little breadth or width; not broad or wide; not as wide as usual or expected: a narrow path.
• reserved — kept in reserve; forming a reserve: a reserve fund; a reserve supply.
• crisp — Food that is crisp is pleasantly hard, or has a pleasantly hard surface.
• forbidding — grim; unfriendly; hostile; sinister: his forbidding countenance.
• astringent — An astringent is a liquid that you put on your skin to make it less oily or to make cuts stop bleeding.
• bitter — In a bitter argument or conflict, people argue very angrily or fight very fiercely.
• ascetic — An ascetic person has a way of life that is simple and strict, usually because of their religious beliefs.
• savage — fierce, ferocious, or cruel; untamed: savage beasts.
• merciless — without mercy; having or showing no mercy; pitiless; cruel: a merciless critic.
• pugnacious — inclined to quarrel or fight readily; quarrelsome; belligerent; combative.
• ruthless — without pity or compassion; cruel; merciless: a ruthless tyrant.
• taut — tightly drawn; tense; not slack.
• uncontrollable — incapable of being controlled or restrained: uncontrollable anger.
• unforgiving — not disposed to forgive or show mercy; unrelenting.
• vicious — addicted to or characterized by vice; grossly immoral; depraved; profligate: a vicious life.
• violent — acting with or characterized by uncontrolled, strong, rough force: a violent earthquake.
• hard-bitten — tough; stubborn.
• aloof — Someone who is aloof is not very friendly and does not like to spend time with other people.