13-Letter Words Containing: I,F,F,L,E,R

• in an affirmative manner

• someone who is appointed or elected to an office and who holds a position of trust

• the official who holds an office

• To make flameproof.

• with indifference; in an indifferent manner

• the quality of being frightful

• To do more than is necessary to fulfil something

• relating to or showing a difference

• involving or containing one or more derivatives

• the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx

• a quality that differentiates between similar things

• a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves

• bearing or containing fossils