raise vs assign

raise is a noun but assign is not a noun.

Word	Noun	Adjective	Verb	Adverb
raise	Yes	No	Yes	No
assign	No	No	Yes	No

As verbs, assign is a hypernym of raise; that is, assign is a word with a broader meaning than raise:

raise: give a promotion to or assign to a higher position
assign: give an assignment to (a person) to a post, or assign a task to (a person)

Other hypernyms of raise include delegate, depute, designate.

raise (noun)	assign (noun)
the act of raising something
increasing the size of a bet (as in poker)
the amount a salary is increased
an upward slope or grade (as in a road)

raise (verb)	assign (verb)
cause to become alive again	select something or someone for a specific purpose
increase the level of	attribute or credit to
raise the level or amount of something	decide as to where something belongs in a scheme
raise in rank or condition	attribute or give
invigorate or heighten	transfer one's right to
put an end to	give out
bring (a surface or a design) into relief and cause to project	make undue claims to having
multiply (a number) by itself a specified number of times: 8 is 2 raised to the power 3	give an assignment to (a person) to a post, or assign a task to (a person)
cause to be heard or known; express or utter
put forward for consideration or discussion
activate or stir up
establish radio communications with
pronounce (vowels) by bringing the tongue closer to the roof of the mouth
cause to assemble or enlist in military
bet more than the previous player
bid (one's partner's suit) at a higher level
summon into action or bring into existence, often as if by magic
construct, build, or erect
cultivate by growing, often involving improvements by means of agricultural techniques
create a disturbance, especially by making a great noise
call forth (emotions, feelings, and responses)
raise from a lower to a higher position
cause to puff up with a leaven
move upwards
collect funds for a specific purpose
look after a child until it is an adult
give a promotion to or assign to a higher position
register formally as a participant or member