But the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
is my defence
misgab (mis-gawb')
a cliff (or other lofty or inaccessible place); abstractly, altitude; figuratively, a refuge -- defence, high fort (tower), refuge, Misgab, a place in Moab -- Misgab.
and my God
'elohiym (el-o-heem')
angels, exceeding, God (gods)(-dess, -ly), (very) great, judges, mighty.
is the rock
tsuwr (tsoor)
a cliff (or sharp rock, as compressed); generally, a rock or boulder; figuratively, a refuge; also an edge (as precipitous)
of my refuge
machaceh (makh-as-eh')
a shelter -- hope, (place of) refuge, shelter, trust.