changeover vs transition

changeover and transition both are nouns.

Word	Noun	Adjective	Verb	Adverb
changeover	Yes	No	No	No
transition	Yes	No	Yes	No

As nouns, changeover and transition are synonyms defined as:

Other synonyms of changeover include conversion.

changeover (noun)	transition (noun)
an event that results in a transformation	the act of passing from one state or place to the next
	a passage that connects a topic to one that follows
	a musical passage moving from one key to another
	an event that results in a transformation
	a change from one place or state or subject or stage to another

changeover (verb)	transition (verb)
	make or undergo a transition (from one state or system to another)
	cause to convert or undergo a transition