hygrometer vs hygrodeik

hygrometer and hygrodeik both are nouns.

Word	Noun	Adjective	Verb	Adverb
hygrometer	Yes	No	No	No
hygrodeik	Yes	No	No	No

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

hygrometer: measuring instrument for measuring the relative humidity of the atmosphere
hygrodeik: a wet and dry bulb hygrometer

Other hyponyms of hygrometer include hygroscope, psychrometer.

hygrometer (noun)	hygrodeik (noun)
measuring instrument for measuring the relative humidity of the atmosphere	a wet and dry bulb hygrometer