trench vs entrenchment

trench and entrenchment both are nouns.

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

trench (noun)	entrenchment (noun)
a ditch dug as a fortification having a parapet of the excavated earth	an entrenched fortification; a position protected by trenches
any long ditch cut in the ground
a long steep-sided depression in the ocean floor

trench (verb)	entrenchment (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