Irish: blas, tástáil
Scots Gaelic: blasad
Welsh: blas; chwaeth
In Irish it's "fiáin"
In Irish it's feall / brath
I don't know if 'Green man' actually is used in Celtic languages. The wikipedia article mentions an ancient Celtic god called Viridios which may derive from 'green'.
'without an end' or 'by ourselves'
In Irish it's lúbra / cathair gríobhháin
The Celtic language family is divided into a "Goidelic" (Irish, Scots and Manx Gaelic) as well as a "Brythonic" branch (Welsh, Breton, Cornish). In other words, Gaelic is a part of the larger Celtic universe.
In Welsh: a enillwyd In Irish: tuillte In Scottish Gaelic: coisinnte
Irish: deirfiúr Scottish Gaelic: piuthar Welsh: chwaer
Irish: aingeal Scots Gaelic: aingeal Welsh: angel
go deo (Irish)am byth (Welsh)
Some Celtic words meaning loyal include dílis (Irish), degemer (Breton), and delweddol (Welsh).
Celtic have a larger support.