juncture vs flood tide

juncture and flood tide both are nouns.

Word	Noun	Adjective	Verb	Adverb
juncture	Yes	No	No	No
flood tide	Yes	No	No	No

As nouns, flood tide is a hyponym of juncture; that is, flood tide is a word with a more specific, narrower meaning than juncture:

juncture: an event that occurs at a critical time
flood tide: the highest point of anything conceived of as growing or developing or unfolding

juncture (noun)	flood tide (noun)
an event that occurs at a critical time	the occurrence of incoming water (between a low tide and the following high tide)
the shape or manner in which things come together and a connection is made	the highest point of anything conceived of as growing or developing or unfolding
a crisis situation or point in time when a critical decision must be made