What is the crossword answer for the clue: I think

IAM - a 3 letter word may be the answer you are looking for!

IMO - a 3 letter word may be the answer you are looking for!

RENE - a 4 letter word may be the answer you are looking for!

COGITOERGOSUMO - a 14 letter word may be the answer you are looking for!

NOT - a 3 letter word may be the answer you are looking for!

SEEMSTOME - a 9 letter word may be the answer you are looking for!

I think

3 Character Answers:

IAM

IMO

NOT

4 Character Answers:

RENE

9 Character Answers:

SEEMSTOME

14 Character Answers:

COGITOERGOSUMO