Quack grass
definition: See Quitch grass.

Quack grass is an 11 letter word that begins with a Q and ends in an S

Quacksalver (n.)
definition: One who boasts of his skill in medicines and salves
Or of the efficacy of his prescriptions; a charlatan; a quack; a mountebank.
Quacksalver is an 11 letter word that begins with a Q and ends in an R

Quadrennial (a.)
definition: Comprising four years; as
A quadrennial period.
Quadrennial is an 11 letter word that begins with a Q and ends in an L

Quadrennial (a.)
definition: Occurring once in four years
Or at the end of every four years; as quadrennial games.
Quadrennial is an 11 letter word that begins with a Q and ends in an L

Quadrennium (n.)
definition: A space or period of four years.

Quadrennium is an 11 letter word that begins with a Q and ends in an M

Quadribasic (a.)
definition: Same as Tetrabasic.

Quadribasic is an 11 letter word that begins with a Q and ends in a C

Quadrillion (n.)
definition: According to the French notation
Which is followed also upon the Continent and in the United States a unit with fifteen ciphers annexed; according to the English notation the number produced by involving a million to the fourth power or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.
Quadrillion is an 11 letter word that begins with a Q and ends in an N

Quadrilobed (a.)
definition: Having four lobes; as
A quadrilobate leaf.
Quadrilobed is an 11 letter word that begins with a Q and ends in a D

Quadrinodal (a.)
definition: Possessing four nodes; as
Quadrinodal curves.
Quadrinodal is an 11 letter word that begins with a Q and ends in an L

Quadrivalve (a.)
definition: Dehiscent into four similar parts; four-valved; as
A quadrivalve pericarp.
Quadrivalve is an 11 letter word that begins with a Q and ends in an E

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