The difference between Before and Thus

When used as adverbs, before means at an earlier time, whereas thus means in this way or manner.

Before is also conjunction with the meaning: in advance of the time when.

Before is also preposition with the meaning: earlier than (in time).

check bellow for the other definitions of Before and Thus

Before as a preposition:

Earlier than (in time).

Examples:

"I want this done before Monday."
Before as a preposition:

In front of in space.

Examples:

"He stood before me."

"We sat before the fire to warm ourselves."
Before as a preposition:

In the presence of.

Examples:

"He performed before the troops in North Africa."

"He spoke before a joint session of Congress."
Before as a preposition:

Under consideration, judgment, authority of (someone).

Examples:

"The case laid before the panel aroused nothing but ridicule."
Before as a preposition:

In store for, in the future of (someone).
Before as a preposition:

In front of, according to a formal system of ordering items.

Examples:

"In alphabetical order, "cat" comes before "dog", "canine" before feline"."
Before as a preposition:

At a higher or greater position than, in a ranking.

Examples:

"An entrepreneur puts market share and profit before quality, an amateur intrinsic qualities before economical considerations."

Before as an adverb:

At an earlier time.

Examples:

"I've never done this before."
Before as an adverb:

In advance.
Before as an adverb:

At the front end.

Thus as an adverb (manner):

In this way or manner.

Examples:

"If you throw the ball thus, as I’m showing you, you’ll have better luck hitting the target."
Thus as an adverb (conjunctive):

As a result.

Examples:

"I have all the tools I need; thus, I will be able to fix the car without having to call a mechanic."