verbalise vs speak

verbalise and speak both are verbs.

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

As verbs, verbalise and speak are synonyms defined as:

Other synonyms of verbalise include mouth, talk, utter, verbalize.

As verbs, speak is a hypernym of verbalise; that is, speak is a word with a broader meaning than verbalise:

Other hypernyms of verbalise include mouth, talk, utter, verbalise, verbalize.

verbalise (verb)	speak (verb)
convert into a verb	express in speech
express in speech	exchange thoughts; talk with
be verbose	use language
articulate; either verbally or with a cry, shout, or noise	give a speech to
	make a characteristic or natural sound