Thank you. I wasn't sure because "Word" kept signifying that it should be in lower caps.
Below is the general rule I use.
Rule 8 Always capitalize the first and last words of titles of publications regardless of their parts of speech. Capitalize other words within titles, including the short verb forms Is, Are, and Be.
Exception Do not capitalize little words within titles such as a, an, the, but, as, if, and, or, nor, or prepositions, regardless of their length.
Examples The Day of the Jackal
What Color Is Your Parachute?
A Tale of Two Cities
Thank you. I will copy this for a reference. Appreciate you shedding some light on this simple but important rule.