
1) Ancient Greek title 2) Epithet of Asclepius 3) Epithet of Poseidon 4) Soil and terrain survey
Found on
https://www.crosswordclues.com/clue/soter

Soter derives from the Greek epithet σωτήρ (sōtēr), meaning a saviour, a deliverer; initial capitalised Σωτήρ; fully capitalised ΣΩΤΗΡ; feminine Soteria (Σωτηρία). Soter has been used as: ...
Found on
http://en.wikipedia.org/wiki/Soter
[daimon] In Greek mythology, Soter was the spirit (daimon) of safety, preservation and deliverance from harm. He was said to be the brother and husband of Praxidike and by her the father of Ktesios, Arete and Homonoia. (Note that both Soter and Ktesios were also cult titles of Zeus). Another source says that Soter was the husband of Peithar...
Found on
http://en.wikipedia.org/wiki/Soter_(daimon)

acronym: Soil and Terrain Survey
Found on
https://www.encyclo.co.uk/local/20002
No exact match found.