proportional sampling vs stratified sampling

proportional sampling and stratified sampling both are nouns.

Word	Noun	Adjective	Verb	Adverb
proportional sampling	Yes	No	No	No
stratified sampling	Yes	No	No	No

As nouns, proportional sampling and stratified sampling are synonyms defined as:

proportional sampling and stratified sampling: the population is divided into subpopulations (strata) and random samples are taken of each stratum

Other synonyms of proportional sampling include representative sampling.

proportional sampling (noun)	stratified sampling (noun)
the population is divided into subpopulations (strata) and random samples are taken of each stratum	the population is divided into subpopulations (strata) and random samples are taken of each stratum