surge vs scend

surge is a noun but scend is not a noun.

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

As verbs, surge and scend are synonyms defined as:

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

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

surge (verb)	scend (verb)
see one's performance improve	rise or heave upward under the influence of a natural force such as a wave
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