| Meaning | An abstraction belonging to or characteristic of two entities or parts together. |
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| Narrower | affinity, kinship | A close connection marked by community of interests or similarity in nature or character |
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| association | A relation resulting from interaction or dependence |
| business relation | A relation between different business enterprises |
| causality | The relation between causes and effects |
| change | A relational difference between states |
| comparison | relation based on similarities and differences |
| connection, connexion, connectedness | A relation between things or events (as in the case of one causing the other or sharing features with it) |
| control | A relation of constraint of one entity (thing or person or group) by another |
| foundation | The basis on which something is grounded |
| function | A relation such that one thing is dependent on another |
| interrelation, interrelationship, interrelatedness | mutual or reciprocal relation or relatedness |
| kinship, family relationship, relationship | (anthropology) relatedness or connection by blood or marriage or adoption |
| linguistic relation | A relation between linguistic / linguistic forms or constituents |
| logical relation | A relation between propositions |
| magnitude relation, quantitative relation | A relation between magnitudes |
| mathematical relation | A relation between mathematical expressions (such as equality or inequality) |
| opposition, oppositeness | The relation between opposed entities |
| ownership | The relation of an owner to the thing possessed |
| part, portion, component part, component, constituent | Something determined in relation to something that includes it |
| position, spatial relation | The spatial property of a place where or way in which something is situated |
| possession | Anything owned or possessed |
| reciprocality, reciprocity | A relation of mutual dependence or action or influence |
| relationship, human relationship | A relation between people |
| social relation | A relation between living organisms (especially between people) |
| temporal relation | A relation involving time |
| unconnectedness | The lack of a connection between things |
| Broader | abstraction, abstract entity | A general concept formed by extracting common features from specific examples |
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| Spanish | relación, vínculo |
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| Catalan | lligam, relació, vincle |
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| Nouns | relationship | a relation between people |
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| relationship | (anthropology) relatedness or connection by blood or marriage or adoption |
| relationship | a state of connectedness between people (especially an emotional connection) |
| Verbs | relate | make a logical or causal connection |
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| relate | be in a relationship with |
