Probably you have realized that one of the limitations of spellcheck is that it doesn’t notice missed words or stray extraneous words. Perhaps more problematic is that it doesn’t do away with word confusions. One possibility is to have someone knowledgeable proofread your work. Another is to recognize that you need to shape up and do something about it.
For each of the following word pairs, write a sentence using each word correctly.
farther/further mantel/mantle anxious /eager. lie /lay
can /may accept/except affect/effect adverse/averse elicit/illicit
among/between advice/advise complement/compliment
eminent/imminent fewer/less if/whether imply/infer liable/likely
nauseous/nauseated morale/moral precede/proceed raise/rear
raise/rise principal/principle stationery/stationary that/which
Check your sentences against a dictionary. Learn the differences. Even one misuse from this list is likely to get your entire manuscript tagged as amateur.