The term 'Fells with an Ax' refers to the process of felling trees, which is the act of cutting them down. The two crossword solutions for this term are 'HEWS' (4 letters) and 'CHOPSDOWN' (9 letters). 'HEWS' is a verb meaning to cut or shape something with an ax or similar tool. 'CHOPSDOWN' is a verb meaning to cut down a tree with an ax. Both words refer to the same action of felling trees with an ax.