headcounter vs enquirer

headcounter and enquirer both are nouns.

Word	Noun	Adjective	Verb	Adverb
headcounter	Yes	No	No	No
enquirer	Yes	No	No	No

As nouns, enquirer is a hypernym of headcounter; that is, enquirer is a word with a broader meaning than headcounter:

Other hypernyms of headcounter include asker, inquirer, querier, questioner.

headcounter (noun)	enquirer (noun)
someone who conducts surveys of public opinion	someone who asks a question