put to death, kill, (man-)slay(-er), murder(-er)

“Manslayer” From Boyd’s Bible Dictionary:

The involuntary manslayer found escape in a city of refuge
({vi 4868-4869}Num. 35:22-23; Deut. 19:5).

“Murder” From Boyd’s Bible Dictionary:

(death). Punished with death (Ex. 21:12; {vi 4876-4877}Num. 35:30-31); but cities of refuge provided for the escape of the involuntary slayer (Ex. 21:13; Num. 35:32; {vi 5408-5420}Deut. 19:1-13).

“38. Murderer. Manslayer. Assassin” From Concise Bible Dictionary:

The words φονεύς, ἀνθρωποκτόνος, and σικάριος are all translated ‘murderer.' φονεύω, the kindred verb to φονεύς (from φόνος, ‘murder') is employed in the LXX in the commandment "Thou shalt not kill," and is repeated in the N. T. This shows that it embraces ‘murder' in general, and those guilty of it are ‘murderers,' Matt. 22:7; 1 Pet. 4:15. Barabbas was a murderer, and the people of Israel were the murderers of Jesus. {vi 27011;27169;27904}Acts 3:14; 7:52; 28:4.
ἀνθρωποκτόνος. (from ἄνθρωππς,man,' and κτείνω,to slay' agrees more with our word ‘man-slayer,' and is applied when murder may not have been committed. "Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him." 1 John 3:15. The devil "was a murderer [mansleer, Wickliffe] from the beginning." John 8:44. This word serves to bring into contrast the slaying of MAN, and eternal life for man through our Lord Jesus Christ.
σικάιος (the Latin sicarius) is so called from sica, a short dagger or poniard. There was a secret society called Sicarii, the members of which carried daggers under their garments, and killed any who opposed them. Perhaps ‘assassin' is the best equivalent. It occurs only in Acts 21:38.

“Man-Slayer” From Concise Bible Dictionary:

See AVENGER.

“Murder” From Concise Bible Dictionary:

The first death was caused by murder when Cain slew his brother Abel, and the second recorded is when Lamech said, “I have slain a man to my wounding,” or “for my wound”; which may mean that he did it in self-defense (Gen. 4:23). God set a mark upon Cain that none should kill him; and Lamech said, “If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold.” After the flood God made a definite law concerning murder. God would require expiation for the blood of man, whether it was shed by beast or by man; at the hand of every man’s brother, or kinsman, God would require the life of man. “Whoso sheddeth man’s blood, by man shall his blood be shed: for in the image of God made He man” ({vi 211-212}Gen. 9:5-6). This injunction was repeated in the law, and has never been rescinded or modified. Neither does the New Testament in any way alter it: indeed it incidentally confirms it by declaring that the magistrate does not bear the sword in vain (Rom. 13:4). God claims the life of man, and none can set aside His rights.

Strong’s Dictionary of Hebrew Words:

Transliteration:
ratsach
Phonic:
raw-tsakh’
Meaning:
a primitive root; properly, to dash in pieces, i.e. kill (a human being), especially to murder
KJV Usage:
put to death, kill, (man-)slay(-er), murder(-er)