propulsion vs dribble

propulsion and dribble both are nouns.

Word	Noun	Adjective	Verb	Adverb
propulsion	Yes	No	No	No
dribble	Yes	No	Yes	No

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

propulsion (noun)	dribble (noun)
the act of propelling	the propulsion of a ball by repeated taps or kicks
a propelling force	saliva spilling from the mouth
	flowing in drops; the formation and falling of drops of liquid

propulsion (verb)	dribble (verb)
	let saliva drivel from the mouth
	propel
	let or cause to fall in drops
	run or flow slowly, as in drops or in an unsteady stream