Solution

FURTHERMORE

3 clues

Also

Word class: Adverb
Nature of clue: Synonym
Difficulty: Very easy

Other solutions to Also

Besides

Word class: Adverb
Nature of clue: Synonym
Difficulty: Easy

Other solutions to Besides

In addition

Word class: Adverb
Nature of clue: Synonym
Difficulty: Easy

Other solutions to In addition

Words are categorized by artificial intelligence: there can be mistakes.