Fast insert of rows with foreign keys in sqlite

I want to store in a sqlite database a lot of tuples of the form (word1, word2, score). Since there are many repetitions of word1 and word2, to save space and have something more compact, I created three tables with the fields:

• Table0 (id1, id2, score)
• Table1 (id, word1)
• Table2 (id, word2)

where id1 and id2 are the foreign keys referring to the primary key ID of Table1 and Table2.

At the beginning I was doing this with just one table (word1, word2, score) and since I have a lot of rows, I was using "INSERT INTO" with "UNION SELECT" as this is explained here: Is it possible to insert multiple rows at a time in an SQLite database?

Is there a similar way to insert multiple rows at the same time with sqlite when we have foreign key constraints?