different between unberth vs unbirth

English

Etymology

un- +? berth

Verb

unberth (third-person singular simple present unberths, present participle unberthing, simple past and past participle unberthed)

1. (transitive) To bring (a ship etc.) out of its berth.

Anagrams

• burneth, burthen

English

Etymology

un- +? birth

Noun

unbirth (uncountable)

1. The absence of birth; failure to be born.
   • 1993, Frank Northen Magill, Magill's Literary Annual, 1993

     His death is a kind of unbirth, and the imagery that surrounds it is physical and sexual.
2. A paraphilia in which the individual desires to be drawn back through the vagina into the womb.
   • 2001, "Hyndis Kogler", FUR:UB #10(last page, overstuffed belly) (on Internet newsgroup fur.artwork.erotica)

     Maybe a bunch of bi incest, [summoning a] muscular, two-cocked demon of some sort, unbirth, and then another demon shows up and mounts the second demon with the female drow in hir belly, and also takes the drow in the same stroke inside her.

   • 2005, "Lord Flame Stryke", Re: Curious (on newsgroup alt.fan.dragons)

     Me, I like vore and unbirth. But then, I'm strange […]