Favorite rare words, M-O

Logolatry

Macrophobia -- fear of prolonged waiting.

Madarosis -- loss of eyelashes or eyebrows.

Maffick -- to celebrate exuberantly and boisterously.

Malaproprism -- misapplication of words without mispronunciation.

Malversation -- corruption in office. corrupt administration, misconduct.

Margaritiferous -- pearl-bearing.

Marline -- small rope wound about larger rope to keep it from fraying.

Maschalephidrosis -- massive sweating of the armpits.

Maudlin -- tearfully sentimental.

Meconium -- first feces of a newborn child.

Meretricious -- of or relating to prostitution, gaudy, flashy.

Merkin -- pubic wig.

Metromania -- insatiable desire for writing verse.

Mewling -- crying feebly.

Miasma -- foul vapors from rotting matter, unwholesome air.

Mizzle -- to rain in small drops.

Mugwump -- one who is neutral politically.

Mullock -- waste earth or rock from a mine.

Mumpsimus -- view stubbornly held even when shown to be wrong.

Mustelid -- of otters, badgers, and weasels.

Myomancy -- divination from the movements of mice.

Nathalie -- la Reine de Nancy (bonsoir, Nathalie!).
OK, so that's a proper name. Let's keep moving...

Naupathia -- sea sickness.

Nemoral -- of a wood or grove.

Nepenthe -- something capable of making one forget suffering (rhymes with absinthe?)

Neritic -- belonging to the shallow waters near land.

Nippitatum -- exceptionally good and strong ale.

Nipter -- ecclesiastical ceremony of washing of feet.

Nostrum -- secret or quack medicine.

Novercaphobia -- irrational fear of one's stepmother.

Nugatory -- inconsequential, inoperative, futile, trifling.

Nunnation -- addition of a final n in the declension of nouns.

Nyctanthous -- flowering at night (I love the way this word looks on the page.)

Oakum -- old ropes untwisted for caulking the seams of ships.

Obsequent -- flowing in opposite direction to original slope of land (as in the east end of Arizona's Grand Canyon).

Obstreperous -- noisy, unruly.

Oenology -- study of wine.

Oikology -- science of housekeeping.

Oikonisus -- desire to start a family.

Oleaginous -- oily; fawning or syncophantic.

Ololygmancy -- divination by the howling of dogs.

Omphalopsychite -- one who meditates by gazing at the navel.

Oose -- furry dust that gathers under beds.

Oppobrium -- disgrace, bad reputation.

Orarian -- costal, a coast-dweller.

Oriel -- small room or recess with a polygonal bay window.

Ouroboros -- snake eating its own tail, symbolizing totality or completion.

Once more: these are selected from Steve Chrisomalis's wonderful Forthright's Phrontistery site.