αἰσθητήριον

νοῦς noûs · G3563 · mind, way of thinking, disposition

νοῦς refers broadly to the mind or faculty of understanding, while αἰσθητήριον specifically denotes the organ or capacity for perception and discernment; both can refer to the capacity for judgment, though αἰσθητήριον emphasizes the sensory/perceptive aspect more than νοῦς

σύνεσις sýnesis · G4907 · understanding, what is understood, to be able to comprehend

σύνεσις denotes the faculty or result of understanding and insight, particularly intellectual comprehension, while αἰσθητήριον refers more specifically to the perceptive organ or capacity for discernment; both convey capacity for judgment but from slightly different angles (intellectual vs. perceptive)

διάνοια diánoia · G1271 · mind, way of thinking, disposition

διάνοια refers to the faculty of mind, thought, or understanding in general, while αἰσθητήριον specifically denotes the organ of perception used for discernment; both can express capacity for judgment, though αἰσθητήριον is more technical and focused on the perceptive mechanism

To be able to perceive, to have the capacity to understand, understanding32.28

This noun denotes a trained faculty of moral perception, as in Hebrews 5:14's description of the mature, who because of practice have their senses trained to distinguish between good and evil.

Words formed from the same root. They share a form, not always a meaning.

Meanings adapted from the UBS Dictionary of the Greek New Testament, © United Bible Societies, CC BY-SA 4.0 and the UBS Dictionary of Biblical Hebrew (from the Semantic Dictionary of Biblical Hebrew), © United Bible Societies, CC BY-SA 4.0; MACULA Greek Linguistic Datasets, available at https://github.com/Clear-Bible/macula-greek/, licensed CC BY 4.0; MACULA Hebrew Linguistic Datasets © 2022-2024 by Biblica, Inc., CC BY 4.0. Westminster Leningrad Codex (tanach.us). OpenScriptures Hebrew Bible morphology (hb.openscriptures.org), CC BY 4.0.