marry vs splice

marry is not a noun while splice is a noun.

Word	Noun	Adjective	Verb	Adverb
marry	No	No	Yes	No
splice	Yes	No	Yes	No

As verbs, marry and splice are synonyms defined as:

Other synonyms of marry include tie, wed.

marry (noun)	splice (noun)
	joint made by overlapping two ends and joining them together
	a junction where two things (as paper or film or magnetic tape) have been joined together

marry (verb)	splice (verb)
take in marriage; married	join by interweaving strands
perform a marriage ceremony	join the ends of
	join together so as to form new genetic combinations
	perform a marriage ceremony