radiomicrometer vs radiometer

radiomicrometer and radiometer both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiomicrometer	Yes	No	No	No
radiometer	Yes	No	No	No

As nouns, radiometer is a hypernym of radiomicrometer; that is, radiometer is a word with a broader meaning than radiomicrometer:

radiomicrometer: radiometer that is extremely sensitive
radiometer: meter to detect and measure radiant energy (electromagnetic or acoustic)

radiomicrometer (noun)	radiometer (noun)
radiometer that is extremely sensitive	meter to detect and measure radiant energy (electromagnetic or acoustic)