There is an option in grep to search the exact string "-F"
-F, --fixed-strings
Its working perfectly fine if there are two words where one is the word to be searched and another is appended with alphaumeric character. However, if the other word contains some special character like '-' then grep -F or grep -w is not matching correct result.
grep -w "hello" test1
hello
hello-
cat test1
hello
hello-
hellotest
ideally only first line should have come in result.