Titus 1:15 πάντα καθαρὰ τοῖς καθαροῖς· τοῖς δὲ μεμιαμμένοις καὶ ἀπίστοις οὐδὲν καθαρόν, ἀλλὰ μεμίανται αὐτῶν καὶ ὁ νοῦς καὶ ἡ συνείδησις.
To the pure, all things are pure; but to those who are defiled and unbelieving, nothing is pure; but both their mind and their conscience are defiled.
Adjective: Nominative Singular Neuter

Revelation 15:6 καὶ ἐξῆλθον οἱ ἑπτὰ ἄγγελοι οἱ ἔχοντες τὰς ἑπτὰ πληγὰς ἐκ τοῦ ναοῦ ἐνδεδυμένοι λίθον / λίνον καθαρὸν λαμπρὸν καὶ περιεζωσμένοι περὶ τὰ στήθη ζώνας χρυσᾶς.
The seven angels who had the seven plagues came out, clothed with pure, bright linen, and wearing golden sashes around their breasts.
Adjective: Accusative Singular Neuter

Revelation 19:8 καὶ ἐδόθη αὐτῇ ἵνα περιβάληται βύσσινον λαμπρὸν καθαρόν· τὸ γὰρ βύσσινον τὰ δικαιώματα τῶν ἁγίων ἐστίν.
It was given to her that she would array herself in bright, pure, fine linen: for the fine linen is the righteous acts of the saints.
Adjective: Accusative Singular Neuter

Revelation 19:14 καὶ τὰ στρατεύματα τὰ ἐν τῷ οὐρανῷ ἠκολούθει αὐτῷ ἐφ' ἵπποις λευκοῖς ἐνδεδυμένοι βύσσινον λευκὸν καθαρόν.
The armies which are in heaven followed him on white horses, clothed in white, pure, fine linen.
Adjective: Accusative Singular Neuter

Revelation 21:18 καὶ ἡ ἐνδώμησις τοῦ τείχους αὐτῆς ἴασπις καὶ ἡ πόλις χρυσίον καθαρὸν ὅμοιον ὑάλῳ καθαρῷ.
The construction of its wall was jasper. The city was pure gold, like pure glass.
Adjective: Nominative Singular Neuter

Revelation 21:21 καὶ οἱ δώδεκα πυλῶνες δώδεκα μαργαρῖται, ἀνὰ εἷς ἕκαστος τῶν πυλώνων ἦν ἐξ ἑνὸς μαργαρίτου. καὶ ἡ πλατεῖα τῆς πόλεως χρυσίον καθαρὸν ὡς ὕαλος διαυγής.
The twelve gates were twelve pearls. Each one of the gates was made of one pearl. The street of the city was pure gold, like transparent glass.
Adjective: Nominative Singular Neuter