trench vs Japan Trench

trench and Japan Trench both are nouns.

Word	Noun	Adjective	Verb	Adverb
trench	Yes	No	Yes	No
Japan Trench	Yes	No	No	No

trench (noun)	Japan Trench (noun)
a ditch dug as a fortification having a parapet of the excavated earth	a depression in the floor of the Pacific Ocean to the northeast of Japan that reaches depths of 30,000 feet
any long ditch cut in the ground
a long steep-sided depression in the ocean floor

trench (verb)	Japan 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