glue vs fish glue

glue and fish glue both are nouns.

Word	Noun	Adjective	Verb	Adverb
glue	Yes	No	Yes	No
fish glue	Yes	No	No	No

As nouns, fish glue is a hyponym of glue; that is, fish glue is a word with a more specific, narrower meaning than glue:

glue: cement consisting of a sticky substance that is used as an adhesive
fish glue: gelatinous substance obtained by boiling skins fins and bones of fish

Other hyponyms of glue include animal glue, casein glue, marine glue.

glue (noun)	fish glue (noun)
cement consisting of a sticky substance that is used as an adhesive	gelatinous substance obtained by boiling skins fins and bones of fish

glue (verb)	fish glue (verb)
be fixed as if by glue
join or attach with or as if with glue