UPDATE: If you want even more help with LSAT vocabulary than the words below (and don’t want to have to memorize hundreds and hundreds of words), check out the LSAT Vocabulary Builder: Words You Need to Know.
You probably know the meanings of most words in the Logical Reasoning section.
However, if you know what all the words mean, the arguments will be much easier to understand.
I’ve compiled a list of common, but difficult, vocabulary words just from glancing through 4-5 sections of Logical Reasoning (and throwing in some words that you absolutely must know), so this list is obviously not intended to be comprehensive.
Because the LSAT is not intended to be a vocabulary test, you probably know most of the below words already.
However, take a quick glance through this list and make sure you know them all.
Don’t spend a great deal of time focusing on vocabulary in your preparation. However, when you see a word you don’t understand, look it up. Just as the same concepts and types of arguments appear on multiple exams, the same words and phrases also appear on multiple exams.
Keep in mind that the LSAT sometimes uses one of a word’s less-common meanings
The LSAT often uses the word “phenomenon” to mean “event” rather than “something unusual.”
The LSAT often uses the word “advance” to mean “to promote an argument” rather than “to literally move something forward.”
Words directly related to arguments
Coherent / Incoherent
Compatible / Incompatible
Confirming / Disconfirming
Consistent / Inconsistent
Valid / Invalid
Vulnerable (to criticism)
Either or / Neither nor
Principal vs. Principle
Extant vs. Extent
Also see: LSAT Logic Games Vocabulary Words and Phrases
Photo by solbronumberone / CC BY-SA 2.0