frequency-response curve vs frequency-response characteristic

frequency-response curve and frequency-response characteristic both are nouns.

Word	Noun	Adjective	Verb	Adverb
frequency-response curve	Yes	No	No	No
frequency-response characteristic	Yes	No	No	No

As nouns, frequency-response curve and frequency-response characteristic are synonyms defined as:

frequency-response curve and frequency-response characteristic: (electronics) a graph of frequency response with signal amplitude or gain plotted against frequency

frequency-response curve (noun)	frequency-response characteristic (noun)
(electronics) a graph of frequency response with signal amplitude or gain plotted against frequency	(electronics) a graph of frequency response with signal amplitude or gain plotted against frequency