1. specialise, specialize

devote oneself to a special area of work

Example Sentences:
'She specializes in honey bees'
'This baker specializes in French bread'

• specialize

2. particularise, particularize, specialise, specialize, specify

be specific about

Example Sentences:
'Could you please specify your criticism of my paper?'

• particularise
• particularize
• specialize
• specify

3. specialise, specialize

suit to a special purpose

Example Sentences:
'specialize one's research'
'this kind of beak has become specialized in certain Galapagos finches'

• specialize

4. narrow, narrow down, specialise, specialize

become more focus on an area of activity or field of study

Example Sentences:
'She specializes in Near Eastern history'

• narrow
• narrow down
• specialize

5. differentiate, specialise, specialize, speciate

evolve so as to lead to a new species or develop in a way most suited to the environment

• differentiate
• specialize
• speciate