com·men·sal·ism 
(kə-mĕnsə-lĭz′əm)
(kə-mĕnsə-lĭz′əm)n.
A symbiotic relationship between two organisms of different species in which one derives some benefit while the other is unaffected.
- chemoprophylaxis
- chemoreception
- chemoreceptive
- chemoreceptivity
- chemoreceptor
- chemosensory
- chemosorb
- chemosorb
- chemosphere
- chemosurgery
- chemosurgical
- chemosynthesis
- chemosynthetic
- chemosynthetically
- chemotactic
- chemotactically
- chemotaxis
- chemotaxonomic
- chemotaxonomically
- chemotaxonomist
- chemotaxonomy
- chemotherapeutic
- chemotherapeutically
- chemotherapist
- chemotherapy