Q: Does "bear" have the same meaning in the following two sentences?

I can not bear his constant criticism.

Bearing orders.

A: different meanings

Q: Does "extension" have the same meaning in the following two sentences?

Most BASIC files use the filename extension .BAS.

The extension of 'satellite of Mars' is the set containing only Demos and Phobos.

A: different meanings

Q: Does "work" have the same meaning in the following two sentences?

Start from the bottom and work towards the top.

She was working on her second martini when the guests arrived.

A:
the same meaning