Here's how to find Word's dictionary on your hard disk:
http://www.howtogeek.com/howto/microsoft-office/transfer-or-move-your-microsoft-office-custom-dictionary/
To change the newlines to commas, use this:
http://codepad.org/KLR9EJgv
And here's mine:
abelian, accessor, acetylcholine, affectively, afterwards, agonist, agonists, aleph, amygdala, amygdalae, amygdaloid, analyses, anaphrodisiac, anaphrodisiacs, Androcur, anhedonia, ANOVA, anthropomorphize, antiparkinsonian, apperception, Archimedean, assumedly, benzodiazepine, betweenness, bijective, biohazard, Bolzano, boundedly, café, calendrical, castrati, cementhead, cerebrospinal, CIs, codomain, colinear, colonoscopy, comorbidity, construal, contralateral, contrapositive, coordinatizing, copasetic, coprime, corticostriatal, could've, counterintuitive, counterintuitively, creatureliness, Cthulhu, curlies, cyproterone, decussate, decussates, defeatingly, deinonychus, diagnosticity, disinhibited, dissociable, distractibility, distractor, dizygotic, dopaminergic, Dopp, draconic, dyphemistic, dysphemism, dysthymia, dystopia, echidna, efferents, electrophysiological, epistemologist, epistemologists, eponym, equicontinuity, equicontinuous, ESMS, ESRB, esurient, eunuchism, eurythmy, evaluability, examinee, excitatory, exponentiate, extraversion, eyeblink, FFI, Firefox, fMRI, forbiddance, formulae, Fraenkel, Freitas, frequentialist, gametogenesis, gauge, gauges, genotyped, genotyping, geocentrism, glutamatergic, golems, Google, gustation, haloperidol, haplotype, Hashanah, hearteningly, homeomorphic, housecat, Hsee, hypercyclic, hypercyclicity, iff, impulsivity, indices, individual's, infimum, injective, injectivity, interdimensional, interlibrary, interquartile, introns, ionotropic, ipsilateral, irreducibles, Kahneman, LaTeX, leapt, lesioned, Likert, limbic, Lipschitz, luminiferous, mage, mages, manual's, may've, Meadville, MediaWiki, medroxyprogesterone, metabotropic, metacharacter, metacharacters, metacognition, midline, might've, millennia, monotreme, monozygotic, mooks, motivationally, multi, multilinear, multilinearity, multiplayer, multiverse, MZ, namespace, nauseam, NEO, neuroeconomics, neuroscientific, neuroscientist, neuroscientists, neuroticism, NFA, nmol, nociception, nondecreasing, nondeterministic, nondeterministically, nonincreasing, nonnegative, nonpositive, nonreflexivity, nonsignificant, nonsingular, norepinephrine, numerousness, Obama, occluder, olfaction, one's, online, operationalize, operationalized, ostensive, ostensively, overweighted, paroxetine, passant, Paxil, platykurtic, Poincaré, postsynaptic, pramipexole, prefrontal, preimage, prepended, prepending, preprocessing, preprocessor, primality, principal's, priori, proband, probands, programmatically, progressivism, progressivist, progressivists, proven, pseudofamiliarity, psychodynamic, psychodynamics, psychometrically, psychometrics, psychopharmaceutical, psychopharmacology, qualia, Rakudo, RCN, recommender, recommenders, reconceptualization, regex, relatedly, resampling, reStructuredText, Rosh, rostral, sanitization, screenshot, sedulity, shapeshift, shapeshifter, shapeshifting, should've, singlemindedly, sinusoids, somatosensory, someone's, Spearman, speciation, species's, spellcaster, SSRI, striatal, striatum, subordinator, subscale, subscales, subsequence, subsequences, superclass, superclass's, superset, suprema, supremum, surjection, surjective, surjectivity, synchronism, syngamy, technobabble, teleport, teleportation, teleported, teleporting, test's, Tetlock, themself, thingie, tormentous, Tourette, transduced, trichotomy, tuple, Tversky, Ubuntu, uncoincidentally, underrepresentation, underweighted, undrugged, untraversable, unyieldingly, vampirism, vengefulness, ventromedial, vigintillion, vigintillions, vortices, Wechsler, weighings, whitespace, wiki, y'know, Zermelo, ZFC, ziggurat, ziggurats.