morning vs time period

morning and time period both are nouns.

Word	Noun	Adjective	Verb	Adverb
morning	Yes	No	No	No
time period	Yes	No	No	No

As nouns, time period is a hypernym of morning; that is, time period is a word with a broader meaning than morning:

Other hypernyms of morning include period, period of time.

morning (noun)	time period (noun)
a conventional expression of greeting or farewell, used to wish someone a good morning	an amount of time
the earliest period
the time period between dawn and noon
the first light of day