Add words starting with letter "A"

[Showndarya]

Create a folder for "A" and add a word.

Refer Contribution.md for more details on how to contribute.

Comment here if you're are working on this issue to avoid conflicts.
Add reference to this issue i.e Issue #52 in your pull request description.

[mbabatunde]

@Showndarya I'm taking this one

[yaswanth-pula]

@Showndarya can i add multiple words for different letters.?

[Showndarya]

@Yaswanth899 Surely.