Theory
//ˈθɪə.ɹi//
Word Type
Noun
The word "theory" can be used as a noun.
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Part Of (Holonyms)
Broader Terms (Hypernyms)
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AAK theory AAK-theory AR theory Ahlfors theory Auslander-Reiten theory BCS theory Bohr theory Chern-Simons theory DLVO theory Debye-Hückel theory Donaldson-Thomas theory Dow theory Fredholm theory Galois theory Green Lantern theory Heim theory Hodge theory James-Lange theory K-theory Kaluza-Klein theory LQG theory M-theory Morse theory Nevanlinna theory Out of India theory Peccei-Quinn theory Ramsey theory Regge theory Sahara pump theory Skopos theory Strauss-Howe generational theory Sturm-Liouville theory Theory X Theory Y Wheeler-Feynman absorber theory X-bar theory X′ theory Yang-Mills theory Zermelo set theory Zermelo-Fraenk set theory abrupt appearance theory abstinence theory abstract analytic number theory acoustic theory action theory activity theory additive number theory algebraic K-theory algebraic graph theory algebraic number theory algorithmic information theory algorithmic number theory alive internet theory analytic number theory antenna theory approximation theory aquatic ape theory arbitrage pricing theory assemblage theory atomic theory attainable region theory attribution theory auction theory auteur theory autotheory bifurcation theory binary theory bow-wow theory bowwow theory broken window theory broken windows theory burnt toast theory cable theory catastrophe theory category theory cell theory chaos theory character theory choice theory circuit theory classical field theory cobweb theory cockroach theory coding theory coincidence theory collision theory communication accommodation theory communication theory complexity theory computability theory computation theory computational complexity theory computational number theory conspiracy theory continuum theory control theory coorbit theory cosmological perturbation theory counterpart theory countertheory critical race theory critical theory crystal field theory cuckoo theory cultivation theory cybertheory de Broglie-Bohm theory dead internet theory decision theory dependency theory ding-dong theory divine command theory domain theory domino theory dual-coding theory dynamo theory e-learning theory ecotheory emission theory endosymbiotic theory epitheory ergodic theory estimation theory ethnotheory evolutionary theory extreme value theory fast leg theory field theory fish-hook theory fishhook theory flypaper theory fringe theory game theory gap theory gauge theory gender theory germ theory germ theory of disease giant impact theory global workspace theory grand theory grand unification theory grand unified theory graph theory great man theory great replacement theory greater fool theory grounded theory group theory hemline theory homotopy theory horseshoe theory iceberg theory imbibition theory infinity theory information theory integral theory inter-universal Teichmüller theory invariant theory ironic process theory kinetic theory of gases knot theory labor theory of value labor value theory labor-value theory labour theory of value labour value theory labour-value theory lattice theory leg theory lesbian dance theory ligand field theory literary theory locale theory lunar theory macrotheory madman theory meaning-text theory measure theory metatheory microtheory minitheory mirror theory model theory module theory molecular orbital theory motor theory music theory musical theory nontheory novelty theory nudge theory number theory operator theory opponent-process theory optimality theory orange peel theory particle theory pattern theory perceptual control theory percolation theory perturbation theory phlogiston theory pooh-pooh theory potential theory probability theory proof theory prototype theory psychotheory quantity theory of money quantum field theory quantum information theory quantum theory quark theory queer theory queueing theory queuing theory r/K selection theory rational choice theory recapitulation theory recursion theory renewal theory replacement theory representation theory rimland theory ring theory ruin theory sandwich theory scheme theory screw theory seduction theory set theory sheaf theory sieve theory signal theory situation theory size theory social theory spectral theory spoon theory standard theory standpoint theory steady state theory stone tape theory stoned ape theory string theory subtheory supposition theory swollen assets theory synthetic theory systems theory ta-ta theory terrain theory theory of abrupt appearance theory of everything theory of games theory of gravity theory of mind theory of music theory of musical equilibration theory of relativity theory of truth theory of value thing theory toy theory transcendental number theory type theory unexpected red theory value theory veneer theory virtue theory vortex theory wave theory white inflation theory white replacement theory yo-he-ho theory yo-heave-ho theory
Type Of (IsA)
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abstract abstract idea academic academic query accepted accepted law answer art axiom bang based belief big big bang big hypothesis class coherent complex complex idea complex story complicated concept conception concepts conclusion conjecture consideration construct darwin darwin evolution darwin had derivable describe discovery educated educated explanation einstein einstein relativity evidence evolution evolution gravity evolution is exhaustive experimental experimental supposition experimented explain explaining explaining idea explanation fact fact based field fiery formal formal idea formal language fun fundamental fundamental idea grand grand explanation gravity had hypothesis hypothetical idea idea possible ideal ideas ideas organization in relativity in science law mad mad science math mathematics method observe of evolution of relativity opinion opinions organization phenomenon physics possibility possible postulate practice principle proofs properties proposition provable proving query reflection relativity relativity gravity researched researched idea science science idea science story scientific scientific answer scientific conjecture scientific explanation scientific hypothesis scientific idea scientific ideal scientific principle scientific proposition scientific statement scientific thought scientific understanding scientific value set speculation speculative speculative idea statement story study supported supposition tested textbooks theological theorem theoretical theoretically thesis thought understanding unproved unproved hypothesis unproven unproven idea untested untested concept value
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.