entwine vs splice

entwine is not a noun while splice is a noun.

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

As verbs, splice is a hyponym of entwine; that is, splice is a word with a more specific, narrower meaning than entwine:

Other hyponyms of entwine include wind, wreathe, wattle, plash, pleach, knot, ravel, tangle.

entwine (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

entwine (verb)	splice (verb)
spin, wind, or twist together	join by interweaving strands
tie or link together	join the ends of
	join together so as to form new genetic combinations
	perform a marriage ceremony