scend vs surge

scend is not a noun while surge is a noun.

Word	Noun	Adjective	Verb	Adverb
scend	No	No	Yes	No
surge	Yes	No	Yes	No

As verbs, scend and surge are synonyms defined as:

scend and surge: rise or heave upward under the influence of a natural force such as a wave

scend (noun)	surge (noun)
	a sudden or abrupt strong increase
	a sudden forceful flow
	a large sea wave

scend (verb)	surge (verb)
rise or heave upward under the influence of a natural force such as a wave	see one's performance improve
	rise rapidly
	rise and move, as in waves or billows
	rise or move forward
	rise or heave upward under the influence of a natural force such as a wave