To receive or welcome versus to exclude — near-opposite meanings.

The action versus the result — a verb and a noun most of the time.

For things you measure versus things you count.

Subject versus object — the pronoun doing it versus the pronoun it happens to.

Possessive versus contraction — a rare case where no apostrophe wins.

Time versus comparison — two different jobs, one letter apart.

You lay something down. You lie down yourself.

Position in space versus a count — ‘under’ isn’t always a substitute.