Synonyms of theory in English:

theory


See US English definition of theory

See UK English definition of theory

See Spanish definition of teoría

noun

1‘I reckon that confirms my theory’

SYNONYMS
hypothesis, thesis, conjecture, supposition, speculation, postulation, postulate, proposition, premise, surmise, assumption, presumption, presupposition, notion, guess, hunch, feeling, suspicion
opinion, view, belief, thinking, thought, thoughts, judgement, contention

2‘the theory of quantum physics’

SYNONYMS
principles, ideas, concepts
principled explanations
laws
philosophy, ideology, system of ideas, science

Phrases

    in theory

    ‘in theory this method is ideal—in practice it is unrealistic’


    SYNONYMS
    in principle, on paper, in the abstract, all things being equal, in an ideal world
    hypothetically
    en principe
    ANTONYMS

    in practice, in reality