combination vs sequence

combination and sequence both are nouns.

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

As nouns, sequence is a hypernym of combination; that is, sequence is a word with a broader meaning than combination:

combination: a sequence of numbers or letters that opens a combination lock
sequence: serial arrangement in which things follow in logical order or a recurrent pattern

As nouns, sequence is a hypernym of combination; that is, sequence is a word with a broader meaning than combination:

combination: a coordinated sequence of chess moves
sequence: serial arrangement in which things follow in logical order or a recurrent pattern

combination (noun)	sequence (noun)
the act of combining things to form a new whole	the action of following in order
the act of arranging elements into specified groups without regard to order	film consisting of a succession of related shots that develop a given subject in a movie
a collection of things that have been combined; an assemblage of separate parts or qualities	a following of one thing after another in time
a group of people (often temporary) having a common purpose	several repetitions of a melodic phrase in different keys
a sequence of numbers or letters that opens a combination lock	serial arrangement in which things follow in logical order or a recurrent pattern
an alliance of people or corporations or countries for a special purpose (formerly to achieve some antisocial end but now for general political or economic purposes)
a coordinated sequence of chess moves

combination (verb)	sequence (verb)
	arrange in a sequence
	determine the order of constituents in