straight fairlead vs fairlead

straight fairlead and fairlead both are nouns.

Word	Noun	Adjective	Verb	Adverb
straight fairlead	Yes	No	No	No
fairlead	Yes	No	No	No

As nouns, fairlead is a hypernym of straight fairlead; that is, fairlead is a word with a broader meaning than straight fairlead:

straight fairlead: a type of fairlead used for guiding anchor lines.
fairlead: a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing

straight fairlead (noun)	fairlead (noun)
a type of fairlead used for guiding anchor lines.	a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing