sentry go vs duty assignment

sentry go and duty assignment both are nouns.

Word	Noun	Adjective	Verb	Adverb
sentry go	Yes	No	No	No
duty assignment	Yes	No	No	No

As nouns, duty assignment is a hypernym of sentry go; that is, duty assignment is a word with a broader meaning than sentry go:

sentry go: the duty of serving as a sentry
duty assignment: a duty that you are assigned to perform (especially in the armed forces)

Other hypernyms of sentry go include assignment.

sentry go (noun)	duty assignment (noun)
the duty of serving as a sentry	a duty that you are assigned to perform (especially in the armed forces)