a song; abstractly, singing -- musical(-ick), sing(-er, -ing), song.
elevation, i.e. the act; specifically a climactic progression (in certain Psalms) -- things that come up, (high) degree, deal, go up, stair, step, story.
They that trust
to hie for refuge; figuratively, to trust, be confident or sure -- be bold (confident, secure, sure), careless (one, woman), put confidence, (make to) hope, (put, make to) trust.
in the LORD
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
shall be as mount
a mountain or range of hills (sometimes used figuratively) -- hill (country), mount(-ain), promotion.
Tsijon (as a permanent capital), a mountain of Jerusalem -- Zion.
which cannot be removed
to waver; by implication, to slip, shake, fall -- be carried, cast, be out of course, be fallen in decay, exceedingly, fall(-ing down), be (re-)moved, be ready, shake, slide, slip.
to sit down (specifically as judge. in ambush, in quiet); by implication, to dwell, to remain; causatively, to settle, to marry
concealed, i.e. the vanishing point; generally, time out of mind (past or future), i.e. (practically) eternity; frequentatively, adverbial (especially with prepositional prefix) always