quick-frozen vs flash-frozen

quick-frozen and flash-frozen both are adjectives.

Word	Noun	Adjective	Verb	Adverb
quick-frozen	No	Yes	No	No
flash-frozen	No	Yes	No	No

As adjectives, quick-frozen and flash-frozen are synonyms defined as:

quick-frozen and flash-frozen: (used of foods) preserved by freezing sufficiently rapidly to retain flavor and nutritional value

Other synonyms of quick-frozen include frozen.

quick-frozen (adjective)	flash-frozen (adjective)
(used of foods) preserved by freezing sufficiently rapidly to retain flavor and nutritional value	(used of foods) preserved by freezing sufficiently rapidly to retain flavor and nutritional value