muffler, n. [scarf], tippet.
mulct, n. [fine], amercement.
mule, n. [hybrid], hinny.
mule-driver, n. muleteer.
mulish, a. See stubborn.
mull, v. [ruminate], [ponder], cogitate.
mulligrubs, n. (Slang) [colic].
multitude, n. [crowd], throng, [host].
mum, a. [silent], [speechless], [dumb], [mute].
mumble, v. [mutter], maunder, mump.