If I understand correctly the way the Bible Sense Lexicon works an entry may have more than one original language word. For 'lamb (year old)' there are two entries — ἀμνός and ἀρνίον

The Bible Sense Lexicon has an entry for 'The Lamb', a theological title which refers to Christ as the sacrificial lamb for sin.
However in that entry it only lists the greek word ἀρνίον whereas, I believe, there should be also ἀμνός and πάσχα. From what I read the either of the words ἀμνός and ἀρνίον can be used interchangeably by NT writers for a lamb.

Every occurrence in the NT of ἀμνός (Jn 1:29, Jn 1:36, Ac 8:32, 1 Pe 1:19) has the sense of the the greek word ἀμνός having the (extra) meaning of 'Lamb of God', clearly and particularly in John.
For πάσχα, Paul obviously in 1 Corinthians 5:7 has made the connection and transition from the Jewish concept of the Passover (lamb), a year old lamb, to Jesus.
It would seem to me for the reasons above that the Bible Sense Lexicon entry for 'The Lamb' should include all three greek words.
Have I misunderstood the tool?
(Also I saw while researching this that the entry for sheep is also wrong as it lists ἀρνίον which is greek for lamb)
EDIT: Also while looking at Mark Barnes video I see in the Bible Facts tool for the entry for Jesus in the 'Referred To As' section that the verses from John are omitted.
Behold, the Lamb of God
29 The next day he saw Jesus coming toward him, and said, “Behold, xthe Lamb of God, who ytakes away the sin zof the world! 30 This is he of whom I said, a‘After me comes a man who ranks before me, because he was before me.’ 31 I myself did not know him, but bfor this purpose I came baptizing with water, that he might be revealed to Israel.” 32 And John cbore witness: d“I saw the Spirit descend from heaven like a dove, and eit remained on him. 33 I myself did not know him, but fhe who sent me to baptize gwith water said to me, ‘He on whom you see the Spirit descend and remain, hthis is he who baptizes gwith the Holy Spirit.’ 34 And I have seen and have borne witness that this is the Son of God.”
Jesus Calls the First Disciples
35 The next day again John was standing with two of his disciples, 36 and he looked at Jesus as he walked by and said, “Behold, ithe Lamb of God!”
