bulwark vs fortification

bulwark and fortification both are nouns.

Word	Noun	Adjective	Verb	Adverb
bulwark	Yes	No	Yes	No
fortification	Yes	No	No	No

bulwark (noun)	fortification (noun)
a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away	the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food)
an embankment built around a space for defensive purposes	defensive structure consisting of walls or mounds built around a stronghold to strengthen it
a fencelike structure around a deck	the art or science of strengthening defenses

bulwark (verb)	fortification (verb)
defend with a bulwark