blossom vs period of time

blossom and period of time both are nouns.

Word	Noun	Adjective	Verb	Adverb
blossom	Yes	No	Yes	No
period of time	Yes	No	No	No

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

Other hypernyms of blossom include period, time period.

blossom (noun)	period of time (noun)
reproductive organ of angiosperm plants especially one having showy or colorful parts	an amount of time
the period of greatest prosperity or productivity

blossom (verb)	period of time (verb)
develop or come to a promising stage
produce or yield flowers