fortification

nouns

defensive structure consisting of walls or mounds built around a stronghold to strengthen it

fortification, munition

is derived from

the art or science of strengthening defenses

fortification

is derived from

is derived from

is a type of (narrower)

a superior skill that you can learn by study and practice and observation

"the art of conversation"; "it's quite an art"

the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food)

fortification

is derived from

is derived from

is derived from

is a type of (narrower)

act of making fuller or more meaningful or rewarding