specialise vs dilate

specialise and dilate both are verbs.

Word	Noun	Adjective	Verb	Adverb
specialise	No	No	Yes	No
dilate	No	No	Yes	No

As verbs, dilate is a hypernym of specialise; that is, dilate is a word with a broader meaning than specialise:

specialise: be specific about
dilate: add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing

Other hypernyms of specialise include elaborate, enlarge, expand, expatiate, exposit, expound, flesh out, lucubrate.

specialise (verb)	dilate (verb)
become more focused on an area of activity or field of study	become wider
suit to a special purpose	add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
evolve so as to lead to a new species or develop in a way most suited to the environment
be specific about
devote oneself to a special area of work