tidemark

noun

tide·​mark ˈtīd-ˌmärk 

1

a

: a high-water or sometimes low-water mark left by tidal water or a flood

b

: a mark placed to indicate this point

2

: the point to which something has attained or below which it has receded

… the tidemark of tolerance has risen.

—Bruce Bliven †1977

Word History

First Known Use

1799, in the meaning defined at sense 1a

Rhymes for tidemark

• disembark
• matriarch
• meadowlark
• patriarch
• watermark
• arc
• ark
• bark
• barque
• dark
• hark
• lark