Gast vs Gnast - What's the difference?

As nouns the difference between gast and gnast

is that gast is a guest while gnast is a spark; a dying spark; a dead spark, as of a snuffed candle.

(ambitransitive) to gnash.

(en verb)

(obsolete) To frighten

And be not so a-gast, for shame! —Geoffrey Chaucer, The House of Fame

Or whether gasted by the noise I made, full suddenly he fled. —William Shakespeare, King Lear

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From (etyl) gnast, knast, from (etyl) .

(en noun)

A spark; a dying spark; a dead spark, as of a snuffed candle.

From (etyl) gnasten, gnaisten, from (etyl) .

(en verb)

(ambitransitive) To gnash.

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