[Ivy2937]

Originally Posted by poli

To stick out like a sore thumb is the most common term.
Because stand out and stick out have similar meanings, they are interchangeable.

Like and as are similar too. but like works best as a preposition and is therefore preferable. As is best as a conjunction in this form and it sounds like an overcorrection as many people incorrectly use like as a conjunction which officially it is not.

PS To stand out is usually a positive phrase. Something stands out for excellence
To stick out is always negative.

How about the verb destacar? I am under the impression that it is a positive term. I assume it can be used negatively as well, but I am not sure.

To stick out/stand out as a sore thumb

Palpario, patente, evidente, palpable, obvio, salta a la vista

Stand out = Poner de relieve, destacar(se), sobresalir.