speak vs memorialize

speak and memorialize both are verbs.

Word	Noun	Adjective	Verb	Adverb
speak	No	No	Yes	No
memorialize	No	No	Yes	No

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

Other hyponyms of speak include blaze away, memorialise, keynote, harangue.

speak (verb)	memorialize (verb)
express in speech	be or provide a memorial to a person or an event
exchange thoughts; talk with	address in a memorial
use language
give a speech to
make a characteristic or natural sound