Luke 6:48θεμέλιον
He is like a man building a house, who dug down deep and laid his foundation on the rock. When the flood came, the torrent crashed against that house but could not shake it, because it was well built.
Acts 16:26θεμέλια
Suddenly a strong earthquake shook the foundations of the prison. At once all the doors flew open and everyone’s chains came loose.
Romans 15:20θεμέλιον
In this way I have aspired to preach the gospel where Christ was not known, so that I would not be building on someone else’s foundation.
1 Corinthians 3:11θεμέλιον
For no one can lay a foundation other than the one already laid, which is Jesus Christ.
Hebrews 6:1θεμέλιον
Therefore let us leave the elementary teachings about Christ and go on to maturity, not laying again the foundation of repentance from dead works, and of faith in God,
Revelation 21:14θεμελίους
The wall of the city had twelve foundations bearing the names of the twelve apostles of the Lamb.

Abbott-Smith

θεμέλιος, -ον
(τίθημι), [in LXX for אַרְמוֹן, מוֹסָד, etc. ;]
of or for a foundation; as subst., ὁ θ. (sc. λίθος), a foundation stone, foundation: Luk.6:48-49 14:29 (but see Deiss., BS, 123); pl., οἰ θ. (cl.), Heb.11:10 Rev.21:14, 19; neut., τὸ θ. (Arist., Phys., vi, 6, 10, LXX and later writers), Act.16:26; metaphorically, Rom.15:20, 1Co.3:10-12 Eph.2:20, 1Ti.6:19, 2Ti.2:19, Heb.6:1.†
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.