102 synonyms for ideal such as code of behaviour, absolute, fanciful, abstract, a dream, archetype, and belief. Ideal is an adjective, and its antonyms are imperfect and subpar.
Absolute, archetypal, best possible, classic, complete, consummate, copybook, exemplary, faultless, flawless, model, perfect, quintessential, supreme, ultimate, and without fault.
Fairy-tale, fanciful, fictitious, hypothetical, idealized, imaginary, impracticable, ivory-towered, quixotic, romantic, theoretical, unachievable, unattainable, unfeasible, unreal, unworkable, utopian, and visionary.
Abstract, academic, conceptual, conjectural, conjectured, hypothetical, ideational, intellectual, metaphysical, notional, philosophical, putative, speculative, suppositional, suppositious, suppositive, and theoretical.
A dream, a nonesuch, beau idéal, crème de la crème, epitome, ne plus ultra, nonpareil, one in a million, paragon, perfection, the bee's knees, the last word, the tops, and the ultimate.
Archetype, belief, code of behaviour, code of honour, conscience, conviction, creed, criterion, decency, ethics, example, exemplar, high-mindedness, honour, ideology, integrity, model, moral value, morality, morals, paradigm, pattern, persuasion, principle, probity, prototype, rectitude, righteousness, rule of living, scruples, sense of duty, sense of honour, standard, uprightness, virtue, and yardstick.