The word 'colonization' or 'colonisation', meaning 'the act of colonising', is a noun.
I'll going to be part of the group in charge of the colonization of Mars!
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.
The word speech is a noun.
Adjective
No, but it's part of a noun which the noun is the part of speech.
Yes, conjunction is a part of speech.