Balancereef (n.)
definition: The last reef in a fore-and-aft
Taken to steady the ship.
Balancereef is an 11 letter word that begins with a B and ends in a F

Bass-relief (n.)
definition: Some as Bas-relief.

Bass-relief is an 11 letter word that begins with a B and ends in a F

Chiff-chaff (n.)
definition: A species of European warbler (Sylvia hippolais); -- called also chip-chap
And pettychaps.
Chiff-chaff is an 11 letter word that begins with a C and ends in a F

Counterbuff (n.)
definition: A blow in an opposite direction; a stroke that stops motion or cause a recoil.

Counterbuff is an 11 letter word that begins with a C and ends in a F

Counterbuff (v.)
definition: To strike or drive back or in an opposite direction; to stop by a blow or impulse in front.

Counterbuff is an 11 letter word that begins with a C and ends in a F

Cross-staff (n.)
definition: A surveyor's instrument for measuring offsets.

Cross-staff is an 11 letter word that begins with a C and ends in a F

Cross-staff (n.)
definition: An instrument formerly used at sea for taking the altitudes of celestial bodies.

Cross-staff is an 11 letter word that begins with a C and ends in a F

Lion's leaf
definition: A South European plant of the genus Leontice (L. leontopetalum)
The tuberous roots of which contain so much alkali that they are sometimes used as a substitute for soap.
Lion's leaf is an 11 letter word that begins with an L and ends in a F

Make-belief (n.)
definition: A feigning to believe; make believe.

Make-belief is an 11 letter word that begins with an M and ends in a F

Mantelshelf (n.)
definition: The shelf of a mantel.

Mantelshelf is an 11 letter word that begins with an M and ends in a F

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