Is Neediest a Adjective?

Needy is an adjective meaning poor. It can also be used as a noun referring collectively to people who are poor or otherwise in need, as in Your donation will help the needy. Another, more informal use of needy is as a negative adjective meaning demanding or having a lot needs to be met.

Is complex an adjective or noun?

The word complex lives up to its name, as it contains multiple parts of speech and senses. It serves as an adjective, a noun, and, less commonly, as a verb.

Is boundary a noun or adjective?

noun, plural bound·a·ries. something that indicates bounds or limits; a limiting or bounding line. Also called frontier.