tret
Old variant of treat I believe.
Tree
rest
tits
You were the first to think of those small birds.
“Tit” might derive from old Swedish, there are speices of a small bird called “tita” /tiːta/ after its call/song at danger. E.g. Entita, Talltita, Bergtita.
/OT
twat
tsar
abra
alar →
paca
pacs
phis