Although correct grammar in speech and writing is very important, in professional settings, it can make or break your career. Check out these 14 words that, when used incorrectly, make you look very unprofessional.

Well and good

Good is an adjective. Well is an adverb. In the English language, these two things serve very different roles linguistically. You are well, whereas an object can be a good thing. Making sure you know the difference between the two is a very professional move.

Affect and effect

Effect is a primarily used as a noun, referring to a change that is a result or consequence of an action or other cause. Affect typically is used as a verb, meaning to have an effect on something. It's a very subtle nuance, but the distinction between the two is important.

Then and than

Than as used in matters of comparison, while then is an adverb describing when in time an event occurred or used to determine a sequence of events. Charlie discovered he was taller than Chuck, and then they ate cookies.

Systemic and systematic

Systematic is the word people usually mean to use in this case. Systematic means carried out according to plan; systemic means belonging to a system as a whole. Take care to not let that extra syllable trip you up.

Every day and everyday

Every day means that something occurs daily. Everyday is used to mean mundane, or commonplace. People often use this adjective incorrectly as a noun, however. It's a small mistake, but one that can make all the difference.

Bring and take

Although these two have vastly different meanings, people still confuse them all the time. Usually, one is asked to bring things somewhere, or asks others to bring things to them. In contrast, we take an object to another location.

Complement and compliment

A complement is something that completes another object. It is, in a sense, the other half to something to make it whole. A compliment is something we tell someone when we think what they're wearing is nice. The difference is crucial to successful discussions in real life.