stream vs spillage

stream and spillage both are nouns.

Word	Noun	Adjective	Verb	Adverb
stream	Yes	No	Yes	No
spillage	Yes	No	No	No

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

Other hyponyms of stream include release, spill, flood, outpouring, overflow.

stream (noun)	spillage (noun)
the act of flowing or streaming; continuous progression	the act of allowing a fluid to escape
a steady flow of a fluid (usually from natural causes)	the amount that has spilled
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

stream (verb)	spillage (verb)
exude profusely
flow freely and abundantly
to extend, wave or float outward, as if in the wind
move in large numbers
rain heavily