blood·worm 
(blŭdwûrm′)
(blŭdwûrm′)n.
1. Any of various marine polychaete worms of the genus Glycera, having bright red bodies and often used for bait.
2. Any of various freshwater larvae of certain midges that are red as a result of the high hemoglobin content of their blood.
3. Any of various parasitic worms of the genus Strongylus that infect the intestinal systems of horses. Also called redworm.
- sore
- sorehead
- sorely
- soreness
- Sorensen
- Sorenstam
- sore throat
- sorgho
- sorgho
- sorghum
- sorgo
- sori
- cardiomegaly
- cardiomyopathy
- cardiopathy
- cardiopulmonary
- cardiopulmonary bypass
- cardiopulmonary resuscitation
- cardiorespiratory
- cardiothoracic
- cardiovascular
- cardiovascular system
- cardioversion
- carditis
- cardoon