bight vs embayment

bight and embayment both are nouns.

Word	Noun	Adjective	Verb	Adverb
bight	Yes	No	Yes	No
embayment	Yes	No	No	No

As nouns, embayment is a hypernym of bight; that is, embayment is a word with a broader meaning than bight:

bight: a broad bay formed by an indentation in the shoreline
embayment: an indentation of a shoreline larger than a cove but smaller than a gulf

Other hypernyms of bight include bay.

bight (noun)	embayment (noun)
the middle part of a slack rope (as distinguished from its ends)	an indentation of a shoreline larger than a cove but smaller than a gulf
a broad bay formed by an indentation in the shoreline
a bend or curve (especially in a coastline)
a loop in a rope

bight (verb)	embayment (verb)
fasten with a bight