dig out vs trench

dig out is not a noun while trench is a noun.

Word	Noun	Adjective	Verb	Adverb
dig out	No	No	Yes	No
trench	Yes	No	Yes	No

As verbs, trench is a hyponym of dig out; that is, trench is a word with a more specific, narrower meaning than dig out:

Other hyponyms of dig out include lift, dibble.

dig out (noun)	trench (noun)
	a ditch dug as a fortification having a parapet of the excavated earth
	any long ditch cut in the ground
	a long steep-sided depression in the ocean floor

dig out (verb)	trench (verb)
create by digging	cut or carve deeply into
dig out from underneath earth or snow	dig a trench or trenches
remove, harvest, or recover by digging	cut a trench in, as for drainage
	fortify by surrounding with trenches
	set, plant, or bury in a trench
	impinge or infringe upon