stratify vs severalise

stratify and severalise both are verbs.

Word	Noun	Adjective	Verb	Adverb
stratify	No	No	Yes	No
severalise	No	No	Yes	No

As verbs, severalise is a hypernym of stratify; that is, severalise is a word with a broader meaning than stratify:

Other hypernyms of stratify include differentiate, distinguish, secern, secernate, separate, severalize, tell, tell apart.

stratify (verb)	severalise (verb)
render fertile and preserve by placing between layers of earth or sand	mark as different
form layers or strata	distinguish or separate
form, arrange, or deposit in layers
divide society into social classes or castes
develop different social levels, classes, or castes