IMC

some of WordPress’s vocabulary

landing page

is the page a visitor arrives at on your website

Header , footer , body , sidebar , navigation menu

parts or webstite
parts of website
header
Header
Footer
Body of websites
Sidebar
widget
widget

Theme , template , plugin

Theme  is defined as a collection of files like the templates and stylesheets that work together to define the appearance and unified design of a WordPress powered website.

theme
Themes

Template :to-use with pre-set themes and styles. All you need to do is add your content
PS: template for home page , about us , services ,contact us so all templates together in the same desing we can say on them  (theme)

templates

plugins:

plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress.