excavation vs fathom

excavation and fathom both are nouns.

Word	Noun	Adjective	Verb	Adverb
excavation	Yes	No	No	No
fathom	Yes	No	Yes	No

excavation (noun)	fathom (noun)
the act of extracting ores or coal etc from the earth	a linear unit of measurement (equal to 6 feet) for water depth
the act of digging	(mining) a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore
a hole in the ground made by excavating
the site of an archeological exploration

excavation (verb)	fathom (verb)
	measure the depth of (a body of water) with a sounding line
	come to understand