tumefy vs expand

tumefy and expand both are verbs.

Word	Noun	Adjective	Verb	Adverb
tumefy	No	No	Yes	No
expand	No	No	Yes	No

As verbs, expand is a hypernym of tumefy; that is, expand is a word with a broader meaning than tumefy:

tumefy (verb)	expand (verb)
expand abnormally	grow vigorously
cause to become very swollen	exaggerate or make bigger
	become larger in size or volume or quantity
	expand the influence of
	make bigger or wider in size, volume, or quantity
	add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
	extend in one or more directions