| Term | Definition |
| interloper | one who intrudes by meddling or trespassing on the rights of others |
| internecine | very destructive to both sides in a conflict; involving slaughter and carnage |
| internecine | pertaining to struggle or conflict within a group, organization, or nation |
| interpolate | to insert or add something between other parts, especially in a text or written word |
| interpolate | to introduce material that severely alters a text or falsifies it |
| interregnum | any period of time when a state is without a ruler of has a provisional government, especially between the region of a sovereign and a successor |
| interregnum | an interval between controlling elements; an interruption in an otherwise continuois function or process |
| interpose | to insert between parts of something; to interject in a conversation |
| interpose | to apply pressure or influence; to meddle; to interfere |
| juxtapose | to place side by side |
| propinquity | nearness; proximity |
| propinquity | kinship |
| rapproachment | reconciliation; restoration of cordial relations, especially between two countries |
| quiescent | at rest; dormant; motionless |
| acquiesce | to agree or consent without any objection |
| requiem | a mass or service for the repose of departed souls; music, poetry, or other composition for the dead |
| unrequited | not reciprocal; not given in payment or returned in kind |
| abtruse | difficult to understand; complex |
| extrude | to push or thrust out in a liquid or malleable substance that retains or solidifies into a predetermined shape |
| obtude | to force one's ideas or oneself insistently upon others |
| obtrude | to thrust or push out; to protrude noticeably, often in an undesirable way |
| altercation | a noisy quarrel |
| altrusim | concern for the welfare of others; unselfishness |
| ephemeral | lasting for a very short time (literally, for one day); transitory; not evelasting |
| epitaph | an inscription on a tombstone in memory of the person buried there; a brief (literary) summary of a dead person's life |
| epitome | a typical representation of something; a person who embodies a quality |
| eponymous | referring to the name of a person, a mythical being, or a literary figure associated with something, or to a word incorporating the name of such a person |
| paradigm | an example serving to illustrate a process, pattern, or concept |
| paradox | a statement that seems contradictory but contains a truth or valid deduction |
| paragon | a model of excellence or perfection |
| parameter | in mathematics, a constant that has variable values and is used to determine other variables |
| parameter | a factor that determines a range of variations; a boundary |
| peripatetic | walking or traveling about |
| peripheral | pertaining to the boundary of an area |
| peripheral | of minor importance |
| anathema | a person or thing detested or shunned |
| anathema | a curse, especially a formal church ban or excommunication |
| antithesis | an exact opposite; a complete contrast |
| antithesis | a rhetorical form juxtaposing contrasting ideas, often in parallel structures |
| epithet | a word or phrase used positively or negatively that characterizes or decribes a person place or thing, added to or replacing a name |