mill vs uptime

mill and uptime both are nouns.

Word	Noun	Adjective	Verb	Adverb
mill	Yes	No	Yes	No
uptime	Yes	No	No	No

mill (noun)	uptime (noun)
the act of grinding to a powder or dust	a period of time when something (as a machine or factory) is functioning and available for use
machinery that processes materials by grinding or crushing
a plant consisting of one or more buildings with facilities for manufacturing

mill (verb)	uptime (verb)
grind with a mill
produce a ridge around the edge of
roll out (metal) with a rolling machine
move about in a confused manner