The function f(x) appears to return higher values for words related to abstract concepts (e.g., "knowledge", "philosophy", "nature") and geographical entities (e.g., "Lake Superior", "ocean", "mountain"). The function tends to return lower values for words related to everyday objects (e.g., "apple", "car"), concrete activities (e.g., "NFL", "music"), and emotions or relationships (e.g., "love", "young").