diff --git a/doc/API.md b/doc/API.md
index 9c292f754a..da6024734b 100644
--- a/doc/API.md
+++ b/doc/API.md
@@ -183,7 +183,7 @@ axe.configure({
       - `any` - array(optional, default `[]`). This is a list of checks that, if none "pass", will generate a violation.
       - `all` - array(optional, default `[]`). This is a list of checks that, if any "fails", will generate a violation.
       - `none` - array(optional, default `[]`). This is a list of checks that, if any "pass", will generate a violation.
-      - `tags` - array(optional, default `[]`). A list if the tags that "classify" the rule. In practice, you must supply some valid tags or the default evaluation will not invoke the rule. The convention is to include the standard (WCAG 2 and/or section 508), the WCAG 2 level, Section 508 paragraph, and the WCAG 2 success criteria. Tags are constructed by converting all letters to lower case, removing spaces and periods and concatinating the result. E.g. WCAG 2 A success criteria 1.1.1 would become ["wcag2a", "wcag111"]
+      - `tags` - array(optional, default `[]`). A list if the tags that "classify" the rule. In practice, you must supply some valid tags or the default evaluation will not invoke the rule. The convention is to include the standard (WCAG 2 and/or section 508), the WCAG 2 level, Section 508 paragraph, and the WCAG 2 success criteria. Tags are constructed by converting all letters to lower case, removing spaces and periods and concatenating the result. E.g. WCAG 2 A success criteria 1.1.1 would become ["wcag2a", "wcag111"]
       - `matches` - string(optional, default `*`). A filtering [CSS selector](./developer-guide.md#supported-css-selectors) that will exclude elements that do not match the CSS selector.
   - `disableOtherRules` - Disables all rules not included in the `rules` property.
   - `locale` - A locale object to apply (at runtime) to all rules and checks, in the same shape as `/locales/*.json`.
@@ -493,7 +493,7 @@ The `assets` attribute expects an array of preload(able) constraints to be fetch
 
 | Asset Type | Description                                                                                                                                                                                                                                                                                                                                                                                                                                  |
 | :--------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `cssom`    | This asset type preloads all CSS Stylesheets rulesets specified in the page. The stylessheets can be an external cross-domain resource, a relative stylesheet or an inline style with in the head tag of the document. If the stylesheet is an external cross-domain a network request is made. An object representing the CSS Rules from each stylesheet is made available to the checks evaluate function as `preloadedAssets` at run-time |
+| `cssom`    | This asset type preloads all CSS Stylesheets rulesets specified in the page. The stylesheets can be an external cross-domain resource, a relative stylesheet or an inline style with in the head tag of the document. If the stylesheet is an external cross-domain a network request is made. An object representing the CSS Rules from each stylesheet is made available to the checks evaluate function as `preloadedAssets` at run-time |
 
 The `timeout` attribute in the object configuration is `optional` and has a fallback default value (10000ms). The `timeout` is essential for any network dependent assets that are preloaded, where-in if a given request takes longer than the specified/ default value, the operation is aborted.
 
@@ -745,7 +745,7 @@ The top-level document or shadow DOM document fragment
 
 #### axe.commons.dom.findUp
 
-Recusively walk up the DOM, checking for a node which matches a selector. Warning: this should be used sparingly for performance reasons.
+Recursively walk up the DOM, checking for a node which matches a selector. Warning: this should be used sparingly for performance reasons.
 
 ##### Synopsis