How could I search in the New Testament for words which are a compound form of φιλό philo [such as φιλόθεος or φιλόξενος]?
By the grace of God I came up with a solution - a morphological search: lemma:φιλ* ANDNOT (lemma:φιλέω OR lemma:φιλία)
My search, I found, was not complete. I found some more forms by looking at the Bible Word Study for φιλαδελφία philadelphia and then looking at ROOT.
So a better search would be lemma:φιλ* ANDNOT (lemma:φιλέω OR lemma:φιλία OR lemma:φίλος OR lemma:φίλημα)
Bill, There's a couple of things to improve its accuracy
---> lemma:φιλ* NOTEQUALS (lemma:φιλέω, lemma:φιλία, lemma:φίλος, lemma:φίλημα)