嘘っぱち[usoppachi] downright lie
嘘っ八百[usoppappyaku] full of lies
嘘でかためる[usodekatameru] to fabricate a web of lies
嘘を付く[usowotsuku] to tell a lie
嘘字[usoji] incorrect character

嘘付き[usotsuki] liar (sometimes said with not much seriousness)
嘘八百[usohappyaku] full of lies
大嘘[oouso] big lie
嘘ぶく[usobuku] to exaggerate