1) Commensal 2) Commensalism 3) Interdependence 4) Interdependency 5) Mutualism 6) Mutualness 7) Parasitism 8) Symbiosis 1) Mutual dependence 2) Mutualness 3) Reciprocality 4) Reciprocity 
A meeting of the minds of contracting parties regarding the material terms of the agreement.
• (n.) Reciprocity of consideration. • (n.) The quality of correlation; reciprocation; interchange; interaction; interdependence.
(i) Refers to mutually owned companies, where certain categories of policyholders (members) have ownership rights; (ii) Refers to a key insurance concept where independent risks are pooled to become insurable.
A system where an organisation is owned by its members without outside shareholders.
Mu`tu·al'i·ty noun [ Confer French mutualité .] 1. The quality of correlation; reciprocation; interchange; interaction; interdependence. 2. (Law) Reciprocity of consideration. Wharton. 
[n] - a reciprocality of sentiments 2. [n] - a reciprocal relation between interdependent entities (objects or individuals or groups)
noun a reciprocality of sentiments; `the mutuality of their affection was obvious`interdependence noun a reciprocal relation between interdependent entities (objects or individuals or groups)
condition or quality of being mutual; reciprocity; mutual dependence.