STIFFEN vs TOUGHEN: VERB

STIFFEN vs TOUGHEN: INTRANSITIVE VERB

STIFFEN vs TOUGHEN: TRANSITIVE VERB

STIFFEN vs TOUGHEN: OTHER WORD TYPES

STIFFEN vs TOUGHEN: RELATED WORDS

STIFFEN vs TOUGHEN: DESCRIBE WORDS

STIFFEN vs TOUGHEN: SENTENCE EXAMPLES

STIFFEN vs TOUGHEN: QUESTIONS

‹‹ Humiliating vs Humbling
De Facto vs Establish ››