immersion vs ducking

immersion and ducking both are nouns.

Word	Noun	Adjective	Verb	Adverb
immersion	Yes	No	No	No
ducking	Yes	No	No	No

As nouns, immersion and ducking are synonyms defined as:

Other synonyms of immersion include dousing, submersion.

immersion (noun)	ducking (noun)
a form of baptism in which part or all of a person's body is submerged	the act of wetting something by submerging it
the act of wetting something by submerging it	hunting ducks
complete attention; intense mental effort
sinking until covered completely with water
(astronomy) the disappearance of a celestial body prior to an eclipse