different between clamless vs clawless

English

clam +? -less

clamless (not comparable)

claw +? -less

clawless (comparative more clawless, superlative most clawless)

Having no claws.
- 1920, Journal of Genetics (volume 9, page 165)
  Where both parents are clawless the progeny also are usually unclawed, indicating that the genetic factors concerned are either wholly lost to the germ plasm or too weak to express themselves in the soma.

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