spill vs well over

spill is a noun but well over is not a noun.

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

As verbs, well over is a hyponym of spill; that is, well over is a word with a more specific, narrower meaning than spill:

Other hyponyms of spill include brim over, overflow, overrun, run over.

spill (noun)	well over (noun)
the act of allowing a fluid to escape
a sudden drop from an upright position
a channel that carries excess water over or around a dam or other obstruction
liquid that is spilled

spill (verb)	well over (verb)
reduce the pressure of wind on (a sail)	flow or run over (a limit or brim)
reveal information
cause or allow (a solid substance) to flow or run out or over
pour out in drops or small quantities or as if in drops or small quantities
cause or allow (a liquid substance) to run or flow from a container
flow, run or fall out and become lost