There are pairs of words that actually mean the same thing. But some people try to make out that they mean something completely different. We like one meaning (hooray!) and we don't like the other (boo!)
childish (boo)/childlike (hooray)
You get the picture.
truth/Truth/Ultimate Truth/a different kind of truth/absolute truth (I think we like "Truth" but not "Absolute Truth". Dame Jocelyn Bell-Burnell, … discovered the pulsar. … a Quaker, Science, she said, is a quest for understanding, not absolute truth.)
Laicidade sim, laicismo não (@rodrigocoppe)
emotion/sentimentality (sentimentality = affected, fake, mawkish emotions. We don't have those!)
More Is There a Difference? here.
More Boo and Hooray words here.