query vs check out

query is a noun but check out is not a noun.

Word	Noun	Adjective	Verb	Adverb
query	Yes	No	Yes	No
check out	No	No	Yes	No

As verbs, check out is a hyponym of query; that is, check out is a word with a more specific, narrower meaning than query:

Other hyponyms of query include enquire, inquire, wonder, interpellate, examine, pump, feel out, sound out, debrief.

query (noun)	check out (noun)
an instance of questioning

query (verb)	check out (verb)
pose a question	examine so as to determine accuracy, quality, or condition
	announce one's departure from a hotel
	try to learn someone's opinions and intentions
	record, add up, and receive payment for items purchased
	withdraw money by writing a check
	trace
	be verified or confirmed; pass inspection