karyon vs pronucleus

karyon and pronucleus both are nouns.

Word	Noun	Adjective	Verb	Adverb
karyon	Yes	No	No	No
pronucleus	Yes	No	No	No

As nouns, pronucleus is a hyponym of karyon; that is, pronucleus is a word with a more specific, narrower meaning than karyon:

karyon: a part of the cell containing DNA and RNA and responsible for growth and reproduction
pronucleus: the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote

Other hyponyms of karyon include subthalamic nucleus.

karyon (noun)	pronucleus (noun)
a part of the cell containing DNA and RNA and responsible for growth and reproduction	the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote