Words Are CATegorical ®

The best-selling Words Are CATegorical® series introduces young readers to different types of words through rhyming verse and illustrations of comical cartoon cats. Offering a lighthearted perspective, each title shows readers the fun and entertaining world of language.

List all available products →

Cover: Pre- and Re-, Mis- and Dis-: What Is a Prefix?

Cover: Chips and Cheese and Nana's Knees: What Is Alliteration?

Cover: -Ful and -Less, -Er and -Ness: What Is a Suffix?

Available Titles
Available Sets
eSource: Free Teaching Guides

Title	Lexile	GRL	ATOS	©
A Mink, a Fink, a Skating Rink: What Is a Noun?		O	3.3	1999
Hairy, Scary, Ordinary: What Is an Adjective?		O	3.9	2000
Dearly, Nearly, Insincerely: What Is an Adverb?	860	O	3.5	2003
Stop and Go, Yes and No: What Is an Antonym?	550	O		2006
Slide and Slurp, Scratch and Burp: More about Verbs	880	O	3.5	2007
How Much Can a Bare Bear Bear?: What Are Homonyms and Homophones?	580	O		2005
Quirky, Jerky, Extra Perky: More about Adjectives	790	O	3.6	2007
Under, Over, By the Clover: What Is a Preposition?	420	O	3.2	2002
To Root, to Toot, to Parachute: What Is a Verb?		O	3.7	2001
Pitch and Throw, Grasp and Know: What Is a Synonym?	510	O	2.8	2005
I and You and Don't Forget Who: What Is a Pronoun?		O	3.0	2004
Lazily, Crazily, Just a Bit Nasally: More about Adverbs	720	O		2008
Stroll and Walk, Babble and Talk: More about Synonyms	620	O		2008
A Lime, a Mime, a Pool of Slime: More about Nouns		O		2006
But and For, Yet and Nor: What Is a Conjunction?	580	O		2010
Straight and Curvy, Meek and Nervy: More about Antonyms	750	O		2009
Skin Like Milk, Hair of Silk: What Are Similes and Metaphors?	560	O		2009
I'm and Won't, They're and Don't: What's a Contraction?	490	O		2010
Cool! Whoa! Ah and Oh!: What Is an Interjection?	540	O		2011
Madam and Nun and 1001: What Is a Palindrome?	610	O		2012

Available in limited formats
Soon! Spring 2026
New! Fall 2025
New! Spring 2025

Title	Season	Lexile	GRL	ATOS	©	Add to Cart
Words Are CATegorical ® — Paperback Set					2015	Paperback $225.84, 27 titles

Available in limited formats
Soon! Spring 2026
New! Fall 2025
New! Spring 2025

Lerner eSource™ offers free digital teaching and learning resources, including Common Core State Standards (CCSS) teaching guides. These guides, created by classroom teachers, offer short lessons and writing exercises that give students specific instruction and practice using Common Core skills and strategies. Lerner eSource also provides additional resources including online activities, downloadable/printable graphic organizers, and additional educational materials that would also support Common Core instruction. Download, share, pin, print, and save as many of these free resources as you like!