A simple tool for all your keyword research is here: Ubersuggest. On the sidelines of Google (and its sometimes confusing interface), Ubersuggest proposes an alternative solution that combines accessibility and speed. Available in many languages and categories (web, images, youtube), the site offers you to enter a word and find all the words that have a relationship with it.
To optimize your SEO and not to forget a single keyword, it is always good to use a tool like Ubersuggest. Other data is available:
Allowing you to identify the most relevant keywords related to your search
Google Trends timeline
Offers you the keyword relevance according to time periods, etc.
Free Chrome and Firefox extension
Allows you to calculate the monthly volume and CPC for each target keyword, plus related keywords.
Ubersuggest’s site and extension are both completely free to use and install.