intrenchment vs trench

intrenchment and trench both are nouns.

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

intrenchment (noun)	trench (noun)
an entrenched fortification; a position protected by trenches	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

intrenchment (verb)	trench (verb)
	cut or carve deeply into
	dig a trench or trenches
	cut a trench in, as for drainage
	fortify by surrounding with trenches
	set, plant, or bury in a trench
	impinge or infringe upon