flood tide

nouns

the highest point of anything conceived of as growing or developing or unfolding
"the climax of the artist's career"; "in the flood tide of his success"
climax, flood tide
the occurrence of incoming water (between a low tide and the following high tide)
"a tide in the affairs of men which, taken at the flood, leads on to fortune" -Shakespeare
flood, flood tide, rising tide
antonym
ebbtide