radio operator vs ham

radio operator and ham both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio operator	Yes	No	No	No
ham	Yes	No	Yes	No

As nouns, ham is a hyponym of radio operator; that is, ham is a word with a more specific, narrower meaning than radio operator:

radio operator (noun)	ham (noun)
someone who operates a radio transmitter	meat cut from the thigh of a hog (usually smoked)
	an unskilled actor who overacts
	a licensed amateur radio operator

radio operator (verb)	ham (verb)
	exaggerate one's acting