monologue
A long speech made by one person
monarch
A person who rules a kingdom (a king or queen)
monogram
A design composed of letters, usually the first letter of a name
monopoly
exclusive control of the trade in some item or service; sole ownership or control of anything
monolith
a large block of stone
unanimous
being in complete agreement
unilateral
one sided
duplex
a dwelling with two living units
duplicate
to make an identical copy or double of something
bilateral
having two sides
bipartisan
involving two political parties
bisect
to divide into two equal parts
monos (root)
one
unus (root)
one
duo (root)
two
duplex (root)
twofold
bi (root)
two