What are collocations and comocations

Can someone explain to me what collocations are and connocations are.Im writing a report about English vocabulary and i need to explain 5 different things.

-Idioms

-synonyms

-homonyms

-collocations

-connocations

I`ve already got 3 of the 5 but i cant find the l;ast 2 because everything i find is in difficult english so can someone explain me in some sentences what collocations and connocations are and can he/she give me a example to

PLZ i really need this so i would be very grateful if someone could give me some help with this

THX