Words that end in at include cat, sat, pat, fat, and mat.
Synonyms for never ending include unending, incessant, infinite, interminable,...
A synonym for opposed that ends in L is assail. !
Inference, outcome and result are synonyms for conclusion.
Amylase is present in the saliva of humans and some other mammals
"At sea" is another way of saying "lost" and it ends in an "a."