Flints

7 clues
Spark makers
Lighter needs
Spark producers
Lighters need these
Fire-starting stones
Spark-producing stones
Stones for starting fires
Similar answers:
Abasements
Abatements
Absents
Abutments
Accents
Accentshappen
Accentswillhappen
Accidents
Accidentsarewaiting
Accidentshappen
Accomplishments
Accountants
Accountantshope
Accounts
Accountsfor
Accountspayable
Accountsplayable
Accoutrements
Achingjoints
Acquiescents