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 There are 4 words containing SUBSON| SUBSONG | • subsong n. (Ornithology) A sequence of sounds uttered by a young bird before it has learned to produce normal birdsong. • SUBSONG n. a bird's undersong.
 |  | SUBSONGS | • subsongs n. Plural of subsong. • SUBSONG n. a bird's undersong.
 |  | SUBSONIC | • subsonic adj. (Of a sound, scientific) having a frequency too low to be audible. • subsonic adj. (Of a sound, literary) very quiet, almost inaudible.
 • subsonic adj. (Of a speed) (aviation) less than the speed of sound (in the same medium, and at the same temperature and pressure).
 |  | SUBSONICALLY | • subsonically adv. In a subsonic manner. • SUBSONIC adv. moving at a speed less than that of sound.
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 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the WikWik.org and 1Word.ws.
 
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