{ "addendum": "addenda", "aircraft": "aircraft", "alga": "algae", "alumna": "alumnae", "alumnus": "alumni", "amoeba": "amoebae", "analysis": "analyses", "antenna": "antennae", "antithesis": "antitheses", "apex": "apices", "appendix": "appendices", "axis": "axes", "bacillus": "bacilli", "bacterium": "bacteria", "barracks": "barracks", "basis": "bases", "beau": "beaux", "bison": "bison", "bureau": "bureaus", "cactus": "cacti", "calf": "calves", "child": "children", "château": "châteaus", "cherub": "cherubim", "codex": "codices", "concerto": "concerti", "corpus": "corpora", "crisis": "crises", "criterion": "criteria", "curriculum": "curricula", "datum": "data", "deer": "deer", "diagnosis": "diagnoses", "die": "dice", "dwarf": "dwarfs", "echo": "echoes", "elf": "elves", "elk": "elk", "ellipsis": "ellipses", "embargo": "embargoes", "emphasis": "emphases", "erratum": "errata", "faux pas": "faux pas", "fez": "fezes", "firmware": "firmware", "fish": "fish", "focus": "foci", "foot": "feet", "formula": "formulae", "fungus": "fungi", "gallows": "gallows", "genus": "genera", "goose": "geese", "graffito": "graffiti", "grouse": "grouse", "half": "halves", "hero": "heroes", "hoof": "hooves", "hypothesis": "hypotheses", "index": "indices", "knife": "knives", "larva": "larvae", "leaf": "leaves", "libretto": "libretti", "life": "lives", "loaf": "loaves", "locus": "loci", "louse": "lice", "man": "men", "matrix": "matrices", "means": "means", "medium": "media", "memorandum": "memoranda", "minutia": "minutiae", "moose": "moose", "mouse": "mice", "nebula": "nebulae", "neurosis": "neuroses", "news": "news", "nucleus": "nuclei", "oasis": "oases", "offspring": "offspring", "opus": "opera", "ovum": "ova", "ox": "oxen", "paralysis": "paralyses", "parenthesis": "parentheses", "phenomenon": "phenomena", "phylum": "phyla", "potato": "potatoes", "prognosis": "prognoses", "quiz": "quizzes", "radius": "radii", "referendum": "referenda", "salmon": "salmon", "scarf": "scarves", "self": "selves", "series": "series", "sheep": "sheep", "shelf": "shelves", "shrimp": "shrimp", "species": "species", "stimulus": "stimuli", "stratum": "strata", "swine": "swine", "syllabus": "syllabi", "symposium": "symposia", "synopsis": "synopses", "synthesis": "syntheses", "tableau": "tableaus", "that": "those", "thesis": "theses", "thief": "thieves", "tomato": "tomatoes", "tooth": "teeth", "trout": "trout", "tuna": "tuna", "vertebra": "vertebrae", "vertex": "vertices", "veto": "vetoes", "vita": "vitae", "vortex": "vortices", "wharf": "wharves", "wife": "wives", "wolf": "wolves", "woman": "women" }