English muffin
architectural
no. no.
bewitched
Parliamentary
Some of the longest common words are querulousness (13 letters), quintessential (14 letters), quatercentennial (16 letters) and quattordecillions (10^45, 17 letters).
There are 13 letters in the word Massachusetts.
Indeed - the word parallelogram is spelt correctly in the question, and has 13 letters.
There are six Greek letters that are commonly used in the English language: alpha, beta, gamma, delta, epsilon, and omega.
The longest word that can be made using these letters is hydrolytic.
'Littlehampton'. 13 letters.
ChuckleVision ??
13 letters in the word "Scarlet Letter"