used

As adjectives the difference between ubiquitous and used

is that ubiquitous is being everywhere at once: omnipresent while used is that is or has or have been used.

As a verb used is

(use).

As verbs the difference between spend and used

is that spend is to pay out (money) while used is (use).

As a noun spend

is amount spent (during a period), expenditure.

As an adjective used is

that is or has or have been used.

As verbs the difference between produced and used

is that produced is (produce) while used is (use).

As an adjective used is

that is or has or have been used.

As verbs the difference between used and operated

is that used is past tense of use while operated is past tense of operate.

As adjectives the difference between used and operated

is that used is that is or has or have been used while operated is operated by the means specified e.g. a battery-operated toy.

As adjectives the difference between doable and used

is that doable is possible to do; feasible while used is that is or has or have been used.

As a verb used is

past tense of use.

As verbs the difference between adopted and used

is that adopted is (adopt) while used is (use).

As an adjective used is

that is or has or have been used.

As verbs the difference between used and had

is that used is (use) while had is (have).

As an adjective used

is that is or has or have been used.

As an adverb usually

is most of the time; less than always, but more than occasionally.

As a verb used is

(use).

As an adjective used is

that is or has or have been used.

As verbs the difference between used and identified

is that used is (use) while identified is (identify).

As an adjective used

is that is or has or have been used.

As verbs the difference between toused and used

is that toused is (touse) while used is (use).

As an adjective used is

that is or has or have been used.