Vocabulary:realise or recognise? (saberingles.com.ar)

Vocabularyrealise or recognise?

Realise means "to know a fact and understand it".
Recognise means "to accept that a fact or a problem exists".
In American English, these verbs are spelled Realize and Recognize. 
Examples:

- I realised that the job was more difficult than I thought.
- She realized that the boy was crying.
- I recognise that the job is more difficult than I thought.
- The government recognized the need of a reform.