Over-reliance (n) 

Meaning: the state is too reliant on someone or something.

Grammar and rules: over-reliance on sth.

Examples from Coca:

(1) While I am not happy certainly at the way things have between first responders and ER doctors are well worth it, but she cautioned against over-reliance.

(2) As much as he disliked the emerging over-reliance on the 3-point shot, he saw the game moving in that direction, and ruled that tests designed by Pearson in that state discriminated against minorities.

(3) There is no “magical” solution, and finding alternative energy sources and reducing over-reliance on particular suppliers isn't something that one can change overnight.

Example: Your major error is over-reliance on the 3C products. 

Matriculation (n)

Meaning: the process of being admitted to a university.

Examples from Coca:

(1.) The Direct entry matriculation requirement stipulates two relevant merit passes including English language at the Nigerian Certificate of Education subsequently cleared and admitted into the universities in the session under consideration. Therefore, matriculation related wastage is operationally used in this study to indicate the potential undergraduate loss due to reasons, which may include: -- Non clearance due to lack of matriculation requirements. -- Candidate's rejection of offer of a course not of choice.

(2). In addition, most assume that students who perform above average on their college matriculation exam will be capable of successfully completing each course in which they enroll. Many dilemmas are to clearly identify the type of program structure to potential students prior to matriculation in order to help them select the type of program structure that would best match time.

(3) A more likely solution is for institutions to provide opportunities for students to enroll participation in dual credit and dual enrollment is increasingly an element of students' pre-college matriculation preparation.

(4) In fact, most of the waning occurs in the first year crystallized learning and academic study system: a cognitive-behavioral approach to studying and learning from matriculation to graduation.

Example: Lisa studies hard everyday in order to pass the matriculation.

Blame game (n)

Meaning: People try to blame someone else for something ​bad ​happened instead of take the responsibility.

Grammar and use: take the blame game to sb/ sth.

Examples from Coca:

(1). to breaking research, it's not French authorities as " backstabbers, " one person wasn't lured into the shrill blame game: Prime Minister David Cameron.

(2). Former Virginia Governor Robert McDonnell took the blame game to a new low when he took the stand at his $170,000 corruption trial and said, " You're blaming. "

(3). If it fails, it then becomes a blame game. Now, people can argue that the president might be able to win the blame game, but then, you just apportioning something nobody wants which is blame.
Example : The police took the blame game to the the suspected terrorists about the mistake shouting.​