gage vs depth gage

gage and depth gage both are nouns.

Word	Noun	Adjective	Verb	Adverb
gage	Yes	No	Yes	No
depth gage	Yes	No	No	No

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

gage: a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.
depth gage: a gauge for measuring the depth of grooves or holes or other concavities

gage (noun)	depth gage (noun)
a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.	a gauge for measuring the depth of grooves or holes or other concavities
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gage (verb)	depth gage (verb)
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