hypothyroidism

Spelling & Dictionary Insight

The English entry for hypothyroidism is 14 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ˌhaɪpəˈθaɪɹɔɪˌdɪzəm/. Corpus data places it at rank #42,705 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.The dominant gloss from Wiktionary reads: "The disease state caused by insufficient production of thyroid hormone by the thyroid gland.".

Our Hunspell-derived misspelling index lists 23 documented wrong-spelling variants for hypothyroidism, with forms such as "hhypothyroidism", "hpyothyroidism", and "hyopthyroidism". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: Coined c. between 1900 and 1905 from hypo- (“under”) + thyroid + -ism. Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is hypothyroidism, spelled H-Y-P-O-T-H-Y-R-O-I-D-I-S-M, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.