escape hatch vs scuttle

escape hatch and scuttle both are nouns.

Word	Noun	Adjective	Verb	Adverb
escape hatch	Yes	No	No	No
scuttle	Yes	No	Yes	No

As nouns, scuttle is a hypernym of escape hatch; that is, scuttle is a word with a broader meaning than escape hatch:

escape hatch: hatchway that provides a means of escape in an emergency
scuttle: an entrance equipped with a hatch; especially a passageway between decks of a ship

Other hypernyms of escape hatch include hatchway, opening.

escape hatch (noun)	scuttle (noun)
hatchway that provides a means of escape in an emergency	container for coal; shaped to permit pouring the coal onto the fire
	an entrance equipped with a hatch; especially a passageway between decks of a ship

escape hatch (verb)	scuttle (verb)
	to move about or proceed hurriedly