entrench vs trench

entrench is not a noun while trench is a noun.

Word	Noun	Adjective	Verb	Adverb
entrench	No	No	Yes	No
trench	Yes	No	Yes	No

As verbs, entrench and trench are synonyms defined as:

Other synonyms of entrench include encroach, impinge.

entrench (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

entrench (verb)	trench (verb)
fix firmly or securely	cut or carve deeply into
occupy a trench or secured area	dig a trench or trenches
impinge or infringe upon	cut a trench in, as for drainage
	fortify by surrounding with trenches
	set, plant, or bury in a trench
	impinge or infringe upon