Fortify is a verb that means “to protect and strengthen.” a fortifications is a that means something that protects.

Noun

Explanation:

This is kind of vague, but if fortify is a verb and a fortification does that verb, then that makes it a noun.

Noun

Explanation:

By adding suffixes to the verbs, many of them can be changed from verb to noun. There are three common ways by which the verbs and be changed into nouns.

Firstly, to change a word from verb to noun, the suffixes "_ance" or "_ence" can be added to them. These suffixes are added to change from verb to noun. Secondly, "ment" can be added to the verb which converts the verb into a noun. Lastly, by adding the suffixes "-tion" and "-sion" nouns can be formed from verbs.

participle: dressed; modifies: bride.