expand vs tumefy

expand and tumefy both are verbs.

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

As verbs, tumefy is a hyponym of expand; that is, tumefy is a word with a more specific, narrower meaning than expand:

Other hyponyms of expand include balloon, billow, inflate, intumesce, swell, swell up, tumesce.

expand (verb)	tumefy (verb)
grow vigorously	expand abnormally
exaggerate or make bigger	cause to become very swollen
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