Fourth grade is near the end of elementary school. By now, most kids know the drill of how to study, do homework, and so 4th grade is a relatively mundane grade. Not yet the biggest kids in the school.

Studying words, if done as part of an overall approach to meaningful education, provides a useful time-proven approach. Avoid trivia, use lists as a way to identify themes and patterns, not for trivia and memorization. Here is an ideas, us ethe  4th grade spelling and vocabulary words lists on SpellingCity.

There are in fact all sorts of lists to help with fourth grade study.

The most useful homeschool curriculum is from Time4Learning which includes Fourth Grade Spelling Words.  A site that has collected resources from lots of place and is dedicated is the fourth grade online curriculum site. This site led me to look deeper into the Time4Learning homeschool curriculum which meant that I found:
What is the real goal of the  4th grade vocabulary games?  It provides a way to get fascinated with game and language. Why is it goose, geese, but moose, mooses. Mouse, mice, but house houses? Why is English so crazy?
Is it just the animal words? Think about building table of words.
Cattle is a mix of cows (female), bulls (male) and calves.
A female horse is a mare, the guy is a stallion, and the youngsters are the colts.
Chicken is the collective. The girls are hens, the boys are roosters, and the babies are chicks.
Pigs are the collectives, piglets are the babies, boars are the males (is that right), and sows are the females.
Still think you master English?
Because vocabulary learning is so vital in   fourth grade writing standards, it is important for parents to encourage fourth grade vocabulary activities at home to complement and reinforce the regular school curriculum. For writing:

Fourth grade spelling and vocabulary word lists are aligned to popular reading series and literacy programs including Journeys and Wonders, making them easy to add into fourth grade lesson plans. Such lists support fourth grade language arts curriculum and can be paired with VocabularySpellingCity’s online games and activities to provide literacy practice. There are also vocabulary lists for fourth grade literature studies such as Bud, Not BuddyBecause of Winn Dixie, and Charlie and the Chocolate Factory.

VocabularySpellingCity also offers varied fourth grade lists that support ELA standards. These include lists that support grammar, vocabulary, word choice and writing such as antonyms and synonyms; homophones and homonyms (multiple meaning words); and figurative language. Writing practice activities can be assigned on the VocabularySpellingCity site to further engage fourth grade students in vocabulary study.