πάτερ (pater)
πάτερ is an Ancient Greek form of πατήρ, meaning “father”.
It can also be a form of πάτηρ, “father”. It is the vocative singular masculine noun.
Found 585 times in the Ancient Greek texts on Socratos.
Where it is used
Apollonius Rhodius, Argonautica 2.1181: ὡς μὲν γὰρ πατέρʼ ὑμὸν ὑπεξείρυτο φόνοιο
Euripides, Cyclops 290: οἳ τὸν σόν, ὦναξ, πατέρ’ ἔχειν νεῶν ἕδρας
Euripides, Heracles 936: Πάτερ, τί θύω πρὶν κτανεῖν Εὐρυσθέα
All forms of πατήρ (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.