How to spell BECOMEIN correctly?

There is no word "becomein", but it may have been intended to be "becoming". Other correct suggestions could be "become", "became", "becomes" or "becomings" depending on the context.

• become
• becomes When autumn arrives, the weather becomes cooler and the leaves change color.
• becoming She is becoming a more confident speaker with each presentation she gives.

Contempories

• contemporaneous
• contemporaries
• contemporary
• contemptuous
• cotemporaries