hold tight vs nest

hold tight is not a noun while nest is a noun.

Word	Noun	Adjective	Verb	Adverb
hold tight	No	No	Yes	No
nest	Yes	No	Yes	No

As verbs, nest is a hyponym of hold tight; that is, nest is a word with a more specific, narrower meaning than hold tight:

Other hyponyms of hold tight include cuddle, draw close, nestle, nuzzle, snuggle.

hold tight (noun)	nest (noun)
	a kind of gun emplacement
	furniture pieces made to fit close together
	a gang of people (criminals or spies or terrorists) assembled in one locality
	a cosy or secluded retreat
	a structure in which animals lay eggs or give birth to their young

hold tight (verb)	nest (verb)
hold firmly, usually with one's hands	fit together or fit inside
	gather nests
	move or arrange oneself in a comfortable and cozy position
	inhabit a nest, usually after building