spot-check vs assure

spot-check and assure both are verbs.

Word	Noun	Adjective	Verb	Adverb
spot-check	No	No	Yes	No
assure	No	No	Yes	No

As verbs, assure is a hypernym of spot-check; that is, assure is a word with a broader meaning than spot-check:

spot-check: pick out random samples for examination in order to ensure high quality
assure: be careful or certain to do something; make certain of something

Other hypernyms of spot-check include ascertain, check, control, ensure, insure, see, see to it.

spot-check (verb)	assure (verb)
pick out random samples for examination in order to ensure high quality	be careful or certain to do something; make certain of something
	inform positively and with certainty and confidence
	assure somebody of the truth of something with the intention of giving the listener confidence
	make a promise or commitment
	make certain of