diff --git a/tests/cypress/integration/features/search/synonyms.spec.js b/tests/cypress/integration/features/search/synonyms.spec.js
new file mode 100644
index 0000000000..b4922b4603
--- /dev/null
+++ b/tests/cypress/integration/features/search/synonyms.spec.js
@@ -0,0 +1,146 @@
+describe('Post Search Feature - Synonyms Functionality', () => {
+	const word1 = 'authenticity';
+	const word2 = 'credibility';
+
+	before(() => {
+		cy.wpCli("wp post list --post_type='ep-synonym' --format=ids", true).then(
+			(wpCliResponse) => {
+				if (wpCliResponse.code === 0) {
+					cy.wpCli(`wp post delete ${wpCliResponse.stdout} --force`, true);
+				}
+			},
+		);
+		cy.wpCli(
+			"wp post list --s='Testing Synonyms' --ep_integrate='false' --format=ids",
+			true,
+		).then((wpCliResponse) => {
+			if (wpCliResponse.code === 0) {
+				cy.wpCli(`wp post delete ${wpCliResponse.stdout} --force`, true);
+			}
+		});
+
+		cy.login();
+
+		const postsData = [
+			{
+				title: `Testing Synonyms - ${word1}`,
+			},
+			{
+				title: `Testing Synonyms - ${word2}`,
+			},
+		];
+		postsData.forEach((postData) => {
+			cy.publishPost(postData);
+		});
+	});
+	beforeEach(() => {
+		cy.login();
+	});
+	it('Can create, search, and delete synonyms sets', () => {
+		// Add the set
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.get('.synonym-sets-editor').within(() => {
+			cy.get('.synonym__remove').click();
+			cy.contains('.button', 'Add Set').click();
+			cy.get('.ep-synonyms__linked-multi-input').type(`${word1}{enter}${word2}{enter}`);
+		});
+		cy.get('#synonym-root .button-primary').click();
+
+		// Check if it works
+		cy.visit(`/?s=${word2}`);
+		cy.contains('.site-content article h2', word1).should('exist');
+
+		// Remove the set
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.get('.synonym-sets-editor .synonym__remove').click();
+		cy.get('#synonym-root .button-primary').click();
+
+		// Check if it works
+		cy.visit(`/?s=${word2}`);
+		cy.contains('.site-content article h2', word1).should('not.exist');
+	});
+	it('Can create, search, and delete synonyms alternatives', () => {
+		// Add the set
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.get('.synonym-alternatives-editor').within(() => {
+			cy.get('.synonym__remove').click();
+			cy.contains('.button', 'Add Alternative').click();
+			cy.get('.ep-synonyms__input').type(word1);
+			cy.get('.ep-synonyms__linked-multi-input').type(`${word2}{enter}`);
+		});
+		cy.get('#synonym-root .button-primary').click();
+
+		// Check if it works
+		cy.visit(`/?s=${word1}`);
+		cy.contains('.site-content article h2', word2).should('exist');
+		cy.visit(`/?s=${word2}`);
+		cy.contains('.site-content article h2', word1).should('not.exist');
+
+		// Remove the set
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.get('.synonym-alternatives-editor .synonym__remove').click();
+		cy.get('#synonym-root .button-primary').click();
+
+		// Check if it works
+		cy.visit(`/?s=${word1}`);
+		cy.contains('.site-content article h2', word2).should('not.exist');
+	});
+	it('Can use the Advanced Text Editor', () => {
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.contains('.page-title-action', 'Switch to Advanced Text Editor').click();
+		cy.get('#ep-synonym-input').clearThenType(`{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		{enter}
+		foo => bar
+		test =>
+		list,of,words
+		`);
+		cy.get('#synonym-root .button-primary').click();
+
+		cy.contains(
+			'.synonym-solr-editor__validation',
+			'Alternatives must have both a primary term and at least one alternative term.',
+		).should('exist');
+
+		cy.get('#ep-synonym-input').clearThenType('foo => bar{enter}list,of,words');
+		cy.get('#synonym-root .button-primary').click();
+		cy.contains('.notice-success', 'Successfully updated synonym filter.').should('exist');
+
+		cy.contains('.page-title-action', 'Switch to Visual Editor').click();
+		cy.contains('.synonym-set-editor div', 'list').should('exist');
+		cy.contains('.synonym-set-editor div', 'of').should('exist');
+		cy.contains('.synonym-set-editor div', 'words').should('exist');
+
+		cy.get('.synonym-alternative-editor input[value="foo"]').should('exist');
+		cy.contains(
+			'.synonym-alternative-editor .ep-synonyms__linked-multi-input div',
+			'bar',
+		).should('exist');
+	});
+	it('Can preserve synonyms if a sync is performed', () => {
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.get('.page-title-action').then(($button) => {
+			if ($button.text() === 'Switch to Advanced Text Editor') {
+				$button.click();
+			}
+		});
+
+		cy.get('#ep-synonym-input').clearThenType('foo => bar{enter}list,of,words');
+		cy.get('#synonym-root .button-primary').click();
+
+		cy.wpCli('elasticpress index --setup --yes');
+
+		cy.visitAdminPage('admin.php?page=elasticpress-synonyms');
+		cy.get('#ep-synonym-input')
+			.should('contain', 'foo => bar')
+			.should('contain', 'list, of, words');
+	});
+});