solemnize vs splice

solemnize is not a noun while splice is a noun.

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

As verbs, splice is a hypernym of solemnize; that is, splice is a word with a broader meaning than solemnize:

Other hypernyms of solemnize include marry, tie, wed.

solemnize (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

solemnize (verb)	splice (verb)
make solemn and grave	join by interweaving strands
observe or perform with dignity or gravity	join the ends of
perform (the wedding ceremony) with proper ceremonies	join together so as to form new genetic combinations
	perform a marriage ceremony