Theological dictionary

All references, as quoted, from wikipedia:

Heathen: Also, pagan. "typically used to refer to polytheistic religious traditions, although from a Christian perspective, the term can encompass all non–Abrahamic religions", "an all-embracing, pejorative term...with overtones of the inferior and the commonplace"... that is to say, everyone who is not good enough to be 'one of us'. That is also to say, everyone not of the "in" crowd, and able to be easily excluded because of perceived inferiority or inability to be "special" enough to be included. In contrast to the vast table of God's grace, where those least likely to be called are those invited to dine at the table, and those who assumed that they deserve to feast based on merit, or even a misunderstanding of grace, find themselves alienated from those at the table.

Heretic/heresy: "a controversial or novel change to a system of beliefs, especially a religion, that conflicts with established dogma, distinct from apostasy". "Irenaeus.. describe(d) and discredit(ed) his opponents during the early centuries of the Catholic Church... the Catholic Church holds Protestantism as espousing numerous heresies... some Protestants considered Catholicism the "Great Apostasy"... Church leaders (held) the power to, in effect, pronounce the death sentence upon those whom the Church considered heretical...Protestant churches were also known to execute those whom they considered as heretics.... The subject of Christian heresy opens up broader questions as to who has a monopoly on spiritual truth"... that is to say, heresy is in the eyes of the beholder. Those who hold the power (at the time) get to determine who are the heretics; it is an abuse and misuse of power in order to remove all legitimate alternative voices. In reality, all are heretical, as any who claim to have the monopoly on truth in effect claims that they are God, possibly the greatest heresy of them all.

Evangelical: I can define this one: There are four distinctives that differentiate evangelical Christianity from other streams of Christian thought, as outlined by Bebbington. 1. Personal decision/conversion to Jesus Christ. 2. The need to share the narrative of Jesus and of evangelism. 3. The high view of Scripture. 4. The centrality of the crucifixion and resurrection of Jesus Christ.
That is to say: There are many who are evangelicals in this world. These are our central unifying distinctives (and even within them, there is a wide diversity of understanding of those four distinctives and their implications). Everything else becomes a bit of gravy. Unilateral decisions on all other issues of what is orthodox and what is not, and then being able to draw lines in the sand as to who is 'evangelical' and who is not based on all other issues is again, another demonstration of theological arrogance.

Cult: "the totality of external religious practice and observance, the neglect of which is the definition of impiety... (it) has come to connote the total cultural aspects of a religion... (it is also) considered subjective... in reference to groups seen as authoritarian... The word implies a group which is a minority in a given society." That is to say, the original usage of the term was to denote all the practices and traditions that were particular to a specific understanding of a religious tradition. Now, the term is a bit more sinister and unfortunately thrown about like candy when labeling those who are different. However, there is also the reality that many people prefer the safety and the black/white dichotomy that many more rigid frameworks offer. It is often too difficult for people to live with uncertainty, mystery and faith; the safety of the rigid, inflexible worldview is often an easier retreat from dealing with society.

Hypocrite: "the state of pretending to have beliefs, opinions, virtues, feelings, qualities, or standards that one does not actually have. Hypocrisy involves the deception of others and is thus a kind of lie." That is to say, people who smile politely at you, and pleasantly chit chat and pretend to be your friend, while meanwhile backstabbing the best they can without having the balls to say anything.