surd

As nouns the difference between surd and burd

is that surd is cheerfulness, alacrity, eagerness while burd is poetic maiden, young woman.

As nouns the difference between surd and surf

is that surd is an irrational number, especially one expressed using the √ symbol while surf is waves that break on an ocean shoreline.

As an adjective surd

is lacking the sense of hearing; deaf.

As a verb surf is

to ride a wave, usually on a surfboard.

As nouns the difference between surd and sard

is that surd is cheerfulness, alacrity, eagerness while sard is (mineral) a variety of carnelian, of a rich reddish yellow or brownish red color.

As a verb sard is

(obsolete) to seduce (a woman).

As a noun surd

is cheerfulness, alacrity, eagerness.

As an adjective sure is

.

As nouns the difference between surd and turd

is that surd is cheerfulness, alacrity, eagerness while turd is (mildly|vulgar) a piece of solid animal or human feces.