order vs sequence

order and sequence both are nouns.

Word	Noun	Adjective	Verb	Adverb
order	Yes	No	Yes	No
sequence	Yes	No	Yes	No

As nouns, sequence is a hyponym of order; that is, sequence is a word with a more specific, narrower meaning than order:

Other hyponyms of order include rank order, grading, scaling, succession, layout, alphabetisation, alphabetization.

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

order (noun)	sequence (noun)
the act of putting things in a sequential arrangement	the action of following in order
(architecture) one of original three styles of Greek architecture distinguished by the type of column and entablature used or a style developed from the original three by the Romans	film consisting of a succession of related shots that develop a given subject in a movie
a degree in a continuum of size or quantity	a following of one thing after another in time
a legally binding command or decision entered on the court record (as if issued by a court or judge)	several repetitions of a melodic phrase in different keys
a commercial document used to request someone to supply something in return for payment and providing specifications and quantities	serial arrangement in which things follow in logical order or a recurrent pattern
a body of rules followed by an assembly
(often plural) a command given by a superior (e.g., a military or law enforcement officer) that must be obeyed
a request for something to be made, supplied, or served
logical or comprehensible arrangement of separate elements
(biology) taxonomic group containing one or more families
a formal association of people with similar interests
a group of person living under a religious rule
established customary state (especially of society)
a condition of regular or proper arrangement

order (verb)	sequence (verb)
bring order to or into	arrange in a sequence
place in a certain order	determine the order of constituents in
assign a rank or rating to
arrange thoughts, ideas, temporal events
make a request for something
give instructions to or direct somebody to do something with authority
issue commands or orders for
bring into conformity with rules or principles or usage; impose regulations
appoint to a clerical posts