A octagon is a octagon without the same angles as the others.
An octagon can be used to create a tessellation, but an octagon cannot tessellate on its own.
Octagons is the plural of octagon
An octagon has 8 sides and 8 corners.
An octagon has 8 vertices.
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.
You should be able to do a keyword search in the title and come up with a list of titles to choose from. Example: I know the title had Octagon in it, so I search for title "Octagon" and titles like "Secret of the Octagon House" and "Octagon Magic" come up.
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.