focus

As nouns the difference between focus and focuser

is that focus is (countable|optics) a point at which reflected or refracted rays of light converge while focuser is a device which allows one to adjust the focus of an instrument such as a telescope.

As a verb focus

is to cause (rays of light, etc) to converge at a single point.

As nouns the difference between specific and focus

is that specific is a distinguishing attribute or quality while focus is (countable|optics) a point at which reflected or refracted rays of light converge.

As an adjective specific

is explicit or definite.

As a verb focus is

to cause (rays of light, etc) to converge at a single point.

As an adjective indefatigable

is extremely persistent and untiring.

As a noun focus is

(countable|optics) a point at which reflected or refracted rays of light converge.

As a verb focus is

to cause (rays of light, etc) to converge at a single point.

As verbs the difference between seek and focus

is that seek is (lb) to try to find, to look for, to search while focus is to cause (rays of light, etc) to converge at a single point.

As a noun focus is

(countable|optics) a point at which reflected or refracted rays of light converge.

In transitive terms the difference between focus and settle

is that focus is to adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane while settle is to colonize; to move people to (a land or territory).

In intransitive terms the difference between focus and settle

is that focus is to concentrate one’s attention while settle is to adjust differences or accounts; to come to an agreement.

As an adjective attentive

is paying attention; noticing, watching, listening, or attending closely.

As a noun focus is

a point at which reflected or refracted rays of light converge.

As a verb focus is

to cause (rays of light, etc) to converge at a single point.