Mammoth Uncensored Word List:
41 words ending with id, 12 letters long

acrocoracoid amphidiploid antherozooid basisphenoid bioflavonoid caesalpinoid cotyledonoid cricothyroid cysticercoid endothelioid feldspathoid flavoproteid hemispheroid hemophilioid hexagrammoid hydrocolloid hyperthyroid hypotrochoid intracarotid leucoplastid lymphomatoid neurosteroid nucleocapsid orthopteroid parasphenoid pentacrinoid perichorioid petromastoid phospholipid plerocercoid postsphenoid protoconulid quasidiploid salamandroid scolopendrid semipellucid spermatozoid sphingolipid stylomastoid subarachnoid xanthochroid