different between ponderable vs etherial

English

From ponder +? -able.

ponderable (comparative more ponderable, superlative most ponderable)

(physics) Having a detectable amount of matter; having a measurable mass.
Worthy of note; significant, interesting.
(rare) Heavy; ponderous.
- 1936, Djuna Barnes, Nightwood, Faber & Faber 2007, p. 77:
  The very mother's head you swore by in the dock is a heavier head, crowned with ponderable hair.

ponderable (plural ponderables)

ether +? -ial

etherial (comparative more etherial, superlative most etherial)

Archaic form of ethereal.
- 1876, Herman Melville, "Of Rama", Clarel
  The innocent if lawless elf, / Etherial in virginity, / Retains the consciousness of self.

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