spill over vs stream

spill over is not a noun while stream is a noun.

Word	Noun	Adjective	Verb	Adverb
spill over	No	No	Yes	No
stream	Yes	No	Yes	No

As verbs, stream is a hypernym of spill over; that is, stream is a word with a broader meaning than spill over:

Other hypernyms of spill over include pour, pullulate, swarm, teem.

spill over (noun)	stream (noun)
	the act of flowing or streaming; continuous progression
	a steady flow of a fluid (usually from natural causes)
	dominant course (suggestive of running water) of successive events or ideas
	a natural body of running water flowing on or under the earth
	something that resembles a flowing stream in moving continuously

spill over (verb)	stream (verb)
overflow with a certain feeling	exude profusely
be disgorged	flow freely and abundantly
	to extend, wave or float outward, as if in the wind
	move in large numbers
	rain heavily