option vs sampling

option and sampling both are nouns.

Word	Noun	Adjective	Verb	Adverb
option	Yes	No	No	No
sampling	Yes	No	No	No

As nouns, sampling is a hyponym of option; that is, sampling is a word with a more specific, narrower meaning than option:

option (noun)	sampling (noun)
the act of choosing or selecting	(statistics) the selection of a suitable sample for study
one of a number of things from which only one can be chosen	measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form)
the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited	items selected at random from a population and used to test hypotheses about the population