1: ᾄδω
(Strong's #103 — Verb — ado — ad'-o )

is used always of "praise to God," (a) intransitively, Ephesians 5:19; Colossians 3:16; (b) transitively, Revelation 5:9; 14:3; 15:3 .

2: ψάλλω
(Strong's #5567 — Verb — psallo — psal'-lo )

see MELODY.

3: ὑμνέω
(Strong's #5214 — Verb — humneo — hoom-neh'-o )

see HYMN , B.