question vs pump

question and pump both are nouns.

Word	Noun	Adjective	Verb	Adverb
question	Yes	No	Yes	No
pump	Yes	No	Yes	No

As verbs, pump is a hyponym of question; that is, pump is a word with a more specific, narrower meaning than question:

Other hyponyms of question include enquire, inquire, wonder, interpellate, examine, check out, feel out, sound out, debrief.

question (noun)	pump (noun)
uncertainty about the truth or factuality or existence of something	a mechanical device that moves fluid or gas by pressure or suction
an instance of questioning	a low-cut shoe without fastenings
the subject matter at issue	the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body
a formal proposal for action made to a deliberative assembly for discussion and vote
a sentence of inquiry that asks for a reply
an informal reference to a marriage proposal

question (verb)	pump (verb)
pose a question	question persistently
challenge the accuracy, probity, or propriety of	deliver forth
place in doubt or express doubtful speculation	operate like a pump; move up and down, like a handle or a pedal
pose a series of questions to	raise (gases or fluids) with a pump
conduct an interview in television, newspaper, and radio reporting	draw or pour with a pump
	flow intermittently
	move up and down
	supply in great quantities