As an adjective acrylic

is (organic chemistry) derived from acrylic acid or acrylonitrile.

As a noun acrylic

is (organic chemistry) an acrylic resin.

As nouns the difference between library and lecture

is that library is an institution which holds books and/or other forms of stored information for use by the public or qualified people it is usual, but not a defining feature of a library, for it to be housed in rooms of a building, to lend items of its collection to members either with or without payment, and to provide various other services for its community of users while lecture is (senseid) a spoken lesson or exposition, usually delivered to a group.

As a verb lecture is

(senseid)(ambitransitive) to teach (somebody) by giving a speech on a given topic.

As nouns the difference between material and artefact

is that material is material (matter which may be shaped or manipulated) while artefact is .

As nouns the difference between practitioner and executor

is that practitioner is a person who practices a profession or art, especially law or medicine while executor is a person who carries out some task.

As a verb endure

is .

As a noun perseverance is

perseverance (persistent determination to adhere to a course of action; insistence).

As nouns the difference between practitioner and exactor

is that practitioner is a person who practices a profession or art, especially law or medicine while exactor is a person who makes illegal or unreasonable demands; an extortioner.

As verbs the difference between depicting and picturing

is that depicting is while picturing is .

As a noun picturing is

depiction.

As a noun zenith

is the point in the sky vertically above a given position or observer; the point in the celestial sphere opposite the nadir.

As a verb peek is

to look slyly, or with the eyes half closed, or through a crevice; to peep.

As an acronym PEEK is

polyetheretherketone.

As verbs the difference between confirm and entrust

is that confirm is to strengthen; to make firm or resolute while entrust is to trust to the care of.

As verbs the difference between deem and blur

is that deem is while blur is to make indistinct or hazy, to obscure or dim.

As a noun blur is

a smear, smudge or blot.