I wish to also point out we are looking at two words. The opposite of truth is false. False is a lie, not just the indiviudal who speaks it. You can follow Christ or you can follow a false Christ. Deciet is what comes from believeing a lie.
Defintions from the Hebrew and Greek below.
You decide who is false and who is true. WHAT is false and what is true. Know your BIBLE.
903 Balaam bal-ah-am' of Hebrew origin (1109); Balaam, a Mesopotamian (symbolic of a false teacher):--Balaam.
940 baskaino bas-kah'-ee-no akin to 5335; to malign, i.e. (by extension) to fascinate (by false representations):--bewitch.
1228 diabolos dee-ab'-ol-os from 1225; a traducer; specially, Satan (compare 7854):--false accuser, devil, slanderer.
1703 empaiktes emp-aheek-tace' from 1702; a derider, i.e. (by implication) a false teacher:--mocker, scoffer.
2215 zizanion dziz-an'-ee-on of uncertain origin; darnel or false grain:--tares.
2403 Iezabel ee-ed-zab-ale' of Hebrew origin (348); Jezabel (i.e. Jezebel), a Tyrian woman (used as a synonym of a termagant or false teacher):--Jezabel.
3982 peitho pi'-tho a primary verb; to convince (by argument, true or false); by analogy, to pacify or conciliate (by other fair means); reflexively or passively, to assent (to evidence or authority), to rely (by inward certainty):--agree, assure, believe, have confidence, be (wax) conflent, make friend, obey, persuade, trust, yield.
4112 plastos plas-tos' from 4111; moulded, i.e. (by implication) artificial or (figuratively) fictitious (false):--feigned.
4811 sukophanteo soo-kof-an-teh'-o from a compound of 4810 and a derivative of 5316; to be a fig-informer (reporter of the law forbidding the exportation of figs from Greece), "sycophant", i.e. (genitive and by extension) to defraud (exact unlawfully, extort):--accuse falsely, take by false accusation.
5271 hupokrinomai hoop-ok-rin'-om-ahee middle voice from 5259 and 2919; to decide (speak or act) under a false part, i.e. (figuratively) dissemble (pretend):--feign.
5569 pseudadelphos psyoo-dad'-el-fos from 5571 and 80; a spurious brother, i.e. pretended associate:--false brethren.
5570 pseudapostolos psyoo-dap-os'-tol-os from 5571 and 652; a spurious apostle, i.e. pretended pracher:--false teacher.
5571 pseudes psyoo-dace' from 5574; untrue, i.e. erroneous, deceitful, wicked:--false, liar.
5572 pseudodidaskalos psyoo-dod-id-as'-kal-os from 5571 and 1320; a spurious teacher, i.e. propagator of erroneous Christian doctrine:--false teacher.
5575 pseudomartur psyoo-dom-ar'-toor from 5571 and a kindred form of 3144; a spurious witness, i.e. bearer of untrue testimony:--false witness.
5576 pseudomartureo psyoo-dom-ar-too-reh'-o from 5575; to be an untrue testifier, i.e. offer falsehood in evidence:--be a false witness.
5577 pseudomarturia psyoo-dom-ar-too-ree'-ah from 5575; untrue testimony:--false witness.
5578 pseudoprophetes psyoo-dop-rof-ay'-tace from 5571 and 4396; a spurious prophet, i.e. pretended foreteller or religious impostor:--false prophet.
5580 pseudochristos psyoo-dokh'-ris-tos from 5571 and 5547; a spurious Messiah:--false Christ.
205 'aven aw-ven' from an unused root perhaps meaning properly, to pant (hence, to exert oneself, usually in vain; to come to naught); strictly nothingness; also trouble. vanity, wickedness; specifically an idol:--affliction, evil, false, idol, iniquity, mischief, mourners(-ing), naught, sorrow, unjust, unrighteous, vain ,vanity, wicked(-ness). Compare
369.
2555 chamac khaw-mawce' from
2554; violence; by implication, wrong; by meton. unjust gain:--cruel(-ty), damage, false, injustice, X oppressor, unrighteous, violence (against, done), violent (dealing), wrong.
3538 kdab ked-ab' (Aramaic) from a root corresponding to
3576; false: -lying.
3577 kazab kaw-zawb' from
3576; falsehood; literally (untruth) or figuratively (idol):--deceitful, false, leasing, + liar, lie, lying.
3579 Kozbiy koz-bee' from
3576; false; Cozbi, a Midianitess:--Cozbi.
4820 mirmah meer-maw' from
7411 in the sense of deceiving; fraud:--craft, deceit(-ful, -fully), false, feigned, guile, subtilly, treachery.
5129 Now`adyah no-ad-yaw' from
3259 and
3050; convened of Jah; Noadjah, the name of an Israelite, and a false prophetess:--Noadiah.
5139 naziyr naw-zeer' or nazir {naw-zeer'}; from
5144; separate, i.e. consecrated (as prince, a Nazirite); hence (figuratively from the latter) an unpruned vine (like an unshorn Nazirite):--Nazarite (by a false alliteration with Nazareth), separate(-d), vine undressed.
5671 `abtiyt ab-teet' from
5670; something pledged, i.e. (collectively) pawned goods:--thick clay (by a false etym.).
6141 `iqqesh ik-kashe' from
6140; distorted; hence, false:--crooked, froward, perverse.
7423 rmiyah rem-ee-yaw' from
7411; remissness, treachery:--deceit(- ful, -fully), false, guile, idle, slack, slothful.
7723 shav' shawv or shav {shav}; from the same as
7722 in the sense of desolating; evil (as destructive), literally (ruin) or morally (especially guile); figuratively idolatry (as false, subjective), uselessness (as deceptive, objective; also adverbially, in vain):--false(-ly), lie, lying, vain, vanity.
7724 Shva' shev-aw' from the same as
7723; false; Sheva, an Israelite:--Sheva.
7962 shalvah shal-vaw' from
7951; security (genuine or false):--abundance, peace(-ably), prosperity, quietness.
8267 sheqer sheh'-ker from
8266; an untruth; by implication, a sham (often adverbial):--without a cause, deceit(-ful), false(-hood, -ly), feignedly, liar, + lie, lying, vain (thing), wrongfully.